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All questions of Assertion & Reason for UPSC CSE Exam
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Pressure cookers are fitted with ebonite handles.
Reason (R): Ebonite is strong.- a)A is true but R is false.
- b)A is false but R is true.
- c)Both A and R are false.
- d)Both A and R are true but R is not the correct explanation of A.
- e)Both A and R are true and R is the correct explanation of A.
Correct answer is option 'A'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Pressure cookers are fitted with ebonite handles.
Reason (R): Ebonite is strong.
Assertion (A): Pressure cookers are fitted with ebonite handles.
Reason (R): Ebonite is strong.
a)
A is true but R is false.
b)
A is false but R is true.
c)
Both A and R are false.
d)
Both A and R are true but R is not the correct explanation of A.
e)
Both A and R are true and R is the correct explanation of A.
|
Goel UPSC Coaching Center answered |
The handles of pressure cookers are made of ebonite because it being a bad conductor of heat, does not heat up.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Graphite is slippery and used as a lubricant.
Reason (R): Graphite has free electrons.- a)Both A and R are true but R is not the correct explanation of A.
- b)Both A and R are true and R is the correct explanation of A.
- c)A is false but R is true.
- d)A is true but R is false.
- e)Both A and R are false.
Correct answer is option 'A'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Graphite is slippery and used as a lubricant.
Reason (R): Graphite has free electrons.
Assertion (A): Graphite is slippery and used as a lubricant.
Reason (R): Graphite has free electrons.
a)
Both A and R are true but R is not the correct explanation of A.
b)
Both A and R are true and R is the correct explanation of A.
c)
A is false but R is true.
d)
A is true but R is false.
e)
Both A and R are false.
|
EduRev UPSC answered |
- Graphite possesses a layer structure with two successive layers held by weak forces and able to slide over one another.
- So, graphite is slippery and this property finds its use as a lubricant.
- In graphite, each carbon atom is linked to three carbon atoms while one electron in the carbon atom is delocalized. So, graphite has free electrons.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Increase in carbon dioxide would melt polar ice.
Reason (R): Global temperature would rise.- a)Both A and R are true but R is not the correct explanation of A.
- b)Both A and R are true and R is the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'B'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Increase in carbon dioxide would melt polar ice.
Reason (R): Global temperature would rise.
Assertion (A): Increase in carbon dioxide would melt polar ice.
Reason (R): Global temperature would rise.
a)
Both A and R are true but R is not the correct explanation of A.
b)
Both A and R are true and R is the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
Kaavya Tiwari answered |
Assertion (A): Increase in carbon dioxide would melt polar ice.
Reason (R): Global temperature would rise.
The correct answer is option 'B', which states that both Assertion (A) and Reason (R) are true and R is the correct explanation of A.
Explanation:
1. Increase in carbon dioxide would melt polar ice:
- The assertion states that an increase in carbon dioxide (CO2) would lead to the melting of polar ice.
- This assertion is supported by scientific evidence and research. CO2 is a greenhouse gas that contributes to the greenhouse effect, which traps heat in the Earth's atmosphere.
- When CO2 levels increase, more heat is trapped, leading to a rise in global temperatures. This rise in temperature has numerous consequences, one of which is the melting of polar ice.
2. Global temperature would rise:
- The reason states that global temperature would rise.
- This reason is also supported by scientific evidence. The increase in CO2 and other greenhouse gases in the atmosphere leads to an enhanced greenhouse effect.
- The greenhouse effect is the process by which certain gases, like CO2, trap heat in the Earth's atmosphere, preventing it from escaping back into space.
- This trapped heat leads to a rise in global temperatures, resulting in climate change and various environmental impacts, including the melting of polar ice.
Conclusion:
- The assertion and reason are interconnected. The increase in CO2 levels is a significant factor in the rise of global temperatures, which in turn leads to the melting of polar ice.
- Therefore, both Assertion (A) and Reason (R) are true, and Reason (R) correctly explains Assertion (A).
- The correct answer is option 'B'.
Reason (R): Global temperature would rise.
The correct answer is option 'B', which states that both Assertion (A) and Reason (R) are true and R is the correct explanation of A.
Explanation:
1. Increase in carbon dioxide would melt polar ice:
- The assertion states that an increase in carbon dioxide (CO2) would lead to the melting of polar ice.
- This assertion is supported by scientific evidence and research. CO2 is a greenhouse gas that contributes to the greenhouse effect, which traps heat in the Earth's atmosphere.
- When CO2 levels increase, more heat is trapped, leading to a rise in global temperatures. This rise in temperature has numerous consequences, one of which is the melting of polar ice.
2. Global temperature would rise:
- The reason states that global temperature would rise.
- This reason is also supported by scientific evidence. The increase in CO2 and other greenhouse gases in the atmosphere leads to an enhanced greenhouse effect.
- The greenhouse effect is the process by which certain gases, like CO2, trap heat in the Earth's atmosphere, preventing it from escaping back into space.
- This trapped heat leads to a rise in global temperatures, resulting in climate change and various environmental impacts, including the melting of polar ice.
Conclusion:
- The assertion and reason are interconnected. The increase in CO2 levels is a significant factor in the rise of global temperatures, which in turn leads to the melting of polar ice.
- Therefore, both Assertion (A) and Reason (R) are true, and Reason (R) correctly explains Assertion (A).
- The correct answer is option 'B'.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Shivaji developed the guerilla warfare.
Reason (R): Shivaji feared the Mughals.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is false but R is true.
- d)A is true but R is false.
- e)Both A and R are false.
Correct answer is option 'D'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Shivaji developed the guerilla warfare.
Reason (R): Shivaji feared the Mughals.
Assertion (A): Shivaji developed the guerilla warfare.
Reason (R): Shivaji feared the Mughals.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is false but R is true.
d)
A is true but R is false.
e)
Both A and R are false.
|
Mrinalini Patel answered |
Explanation:
Assertion (A): Shivaji developed the guerilla warfare.
Reason (R): Shivaji feared the Mughals.
Assertion (A): Shivaji developed the guerilla warfare.
Reason (R): Shivaji feared the Mughals.
- Shivaji did indeed develop the guerilla warfare strategy, which involved using surprise attacks, ambushes, and hit-and-run tactics against the more powerful Mughal forces.
- Shivaji's use of guerilla warfare was not solely based on fear of the Mughals, but rather a strategic decision to combat the superior forces of the Mughal Empire.
- Shivaji's primary goal was to establish an independent Maratha kingdom and protect the interests of his people, which required innovative military tactics like guerilla warfare.
- Therefore, while both Assertion (A) and Reason (R) are true, the Reason is not the correct explanation of the Assertion.
- Option 'D' is the correct choice, as Assertion (A) is true but Reason (R) is false in this case.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Beri-beri is a viral infection.
Reason (R): Vitamin deficiency causes diseases.- a)Both A and R are true but R is not the correct explanation of A.
- b)Both A and R are true and R is the correct explanation of A.
- c)A is false but R is true.
- d)A is true but R is false.
- e)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Beri-beri is a viral infection.
Reason (R): Vitamin deficiency causes diseases.
Assertion (A): Beri-beri is a viral infection.
Reason (R): Vitamin deficiency causes diseases.
a)
Both A and R are true but R is not the correct explanation of A.
b)
Both A and R are true and R is the correct explanation of A.
c)
A is false but R is true.
d)
A is true but R is false.
e)
Both A and R are false.
|
|
Anisha Singh answered |
Assertion: Beri-beri is a viral infection.
Reason: Vitamin deficiency causes diseases.
The correct answer is option C: A is false but R is true.
Explanation:
1. Beri-beri is not a viral infection:
- Beri-beri is a nutritional deficiency disease caused by a lack of thiamine (vitamin B1) in the diet.
- It is not caused by a viral infection.
- Beri-beri primarily affects individuals who consume a diet primarily consisting of polished rice, which lacks thiamine.
2. Vitamin deficiency causes diseases:
- The reason given in statement R is true.
- Deficiency of vitamins in the diet can lead to various diseases and health issues.
- Vitamins are essential nutrients required for the proper functioning of the body.
- Different vitamins play different roles in maintaining good health, and their deficiencies can result in specific diseases or conditions.
Examples of diseases caused by vitamin deficiencies:
- Vitamin C deficiency can lead to scurvy, which is characterized by weakness, anemia, gum disease, and skin problems.
- Vitamin D deficiency can cause rickets in children and osteomalacia in adults, leading to bone deformities and weakness.
- Vitamin A deficiency can result in night blindness and other eye problems.
- Vitamin B12 deficiency can lead to pernicious anemia, which causes fatigue, weakness, and nerve damage.
Conclusion:
Beri-beri is not a viral infection; it is a disease caused by a deficiency of thiamine (vitamin B1) in the diet. However, the reason given in statement R is correct, as vitamin deficiency can indeed cause various diseases. Thus, option C is the correct answer.
Reason: Vitamin deficiency causes diseases.
The correct answer is option C: A is false but R is true.
Explanation:
1. Beri-beri is not a viral infection:
- Beri-beri is a nutritional deficiency disease caused by a lack of thiamine (vitamin B1) in the diet.
- It is not caused by a viral infection.
- Beri-beri primarily affects individuals who consume a diet primarily consisting of polished rice, which lacks thiamine.
2. Vitamin deficiency causes diseases:
- The reason given in statement R is true.
- Deficiency of vitamins in the diet can lead to various diseases and health issues.
- Vitamins are essential nutrients required for the proper functioning of the body.
- Different vitamins play different roles in maintaining good health, and their deficiencies can result in specific diseases or conditions.
Examples of diseases caused by vitamin deficiencies:
- Vitamin C deficiency can lead to scurvy, which is characterized by weakness, anemia, gum disease, and skin problems.
- Vitamin D deficiency can cause rickets in children and osteomalacia in adults, leading to bone deformities and weakness.
- Vitamin A deficiency can result in night blindness and other eye problems.
- Vitamin B12 deficiency can lead to pernicious anemia, which causes fatigue, weakness, and nerve damage.
Conclusion:
Beri-beri is not a viral infection; it is a disease caused by a deficiency of thiamine (vitamin B1) in the diet. However, the reason given in statement R is correct, as vitamin deficiency can indeed cause various diseases. Thus, option C is the correct answer.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Bronze is used for making statues.
Reason (R): Bronze is an alloy of copper and tin.- a)Both A and R are true but R is not the correct explanation of A.
- b)Both A and R are true and R is the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'A'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Bronze is used for making statues.
Reason (R): Bronze is an alloy of copper and tin.
Assertion (A): Bronze is used for making statues.
Reason (R): Bronze is an alloy of copper and tin.
a)
Both A and R are true but R is not the correct explanation of A.
b)
Both A and R are true and R is the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
|
Jhanvi Kumar answered |
Explanation:
Assertion (A): Bronze is used for making statues.
Reason (R): Bronze is an alloy of copper and tin.
- Both A and R are true but R is not the correct explanation of A: This option is incorrect because both statements are true. Bronze is indeed used for making statues and it is an alloy of copper and tin.
- Both A and R are true and R is the correct explanation of A: This option is also incorrect because while both statements are true, the reason provided does explain why bronze is used for making statues. Bronze is used for statues due to its durability, malleability, and resistance to corrosion.
- A is true but R is false: This option is incorrect as both statements are true. Bronze is indeed used for making statues, and it is an alloy of copper and tin.
- A is false but R is true: This option is incorrect as the assertion is true. Bronze is commonly used for statues.
- Both A and R are false: This option is incorrect as both statements are true.
Therefore, the correct answer is option 'Both A and R are true but R is not the correct explanation of A.' Bronze is used for making statues because of its properties like resistance to corrosion, malleability, and durability rather than just being an alloy of copper and tin.
Assertion (A): Bronze is used for making statues.
Reason (R): Bronze is an alloy of copper and tin.
- Both A and R are true but R is not the correct explanation of A: This option is incorrect because both statements are true. Bronze is indeed used for making statues and it is an alloy of copper and tin.
- Both A and R are true and R is the correct explanation of A: This option is also incorrect because while both statements are true, the reason provided does explain why bronze is used for making statues. Bronze is used for statues due to its durability, malleability, and resistance to corrosion.
- A is true but R is false: This option is incorrect as both statements are true. Bronze is indeed used for making statues, and it is an alloy of copper and tin.
- A is false but R is true: This option is incorrect as the assertion is true. Bronze is commonly used for statues.
- Both A and R are false: This option is incorrect as both statements are true.
Therefore, the correct answer is option 'Both A and R are true but R is not the correct explanation of A.' Bronze is used for making statues because of its properties like resistance to corrosion, malleability, and durability rather than just being an alloy of copper and tin.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The Indian Constitution came into force with effect from 26th January, 1950
Reason (R): 26th January is celebrated as the Republic day.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'B'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The Indian Constitution came into force with effect from 26th January, 1950
Reason (R): 26th January is celebrated as the Republic day.
Assertion (A): The Indian Constitution came into force with effect from 26th January, 1950
Reason (R): 26th January is celebrated as the Republic day.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
Shail Unni answered |
Assertion (A): The Indian Constitution came into force with effect from 26th January, 1950.
Reason (R): 26th January is celebrated as the Republic day.
Explanation:
The Assertion (A) states that the Indian Constitution came into force on 26th January, 1950. This is indeed true. The adoption of the Constitution marked the transition of India from a British dominion to a sovereign democratic republic. The Constituent Assembly of India had adopted the Constitution on 26th November, 1949, but it was enacted and became effective from 26th January, 1950.
The Reason (R) states that 26th January is celebrated as Republic Day. This is also true. Republic Day is celebrated every year on 26th January to commemorate the day when the Constitution of India came into effect. It is a national holiday and is celebrated with grand parades, cultural performances, and flag hoisting ceremonies in different parts of the country.
Conclusion:
Both Assertion (A) and Reason (R) are true. However, Reason (R) is not the correct explanation of Assertion (A). The reason simply states the fact that 26th January is celebrated as Republic Day, but it does not explain why the Indian Constitution came into force on that day. The adoption and enactment of the Constitution on 26th January, 1950, were based on historical and political considerations and not solely because of the celebration of Republic Day. Hence, the correct answer is option 'B' - Both A and R are true but R is not the correct explanation of A.
Reason (R): 26th January is celebrated as the Republic day.
Explanation:
The Assertion (A) states that the Indian Constitution came into force on 26th January, 1950. This is indeed true. The adoption of the Constitution marked the transition of India from a British dominion to a sovereign democratic republic. The Constituent Assembly of India had adopted the Constitution on 26th November, 1949, but it was enacted and became effective from 26th January, 1950.
The Reason (R) states that 26th January is celebrated as Republic Day. This is also true. Republic Day is celebrated every year on 26th January to commemorate the day when the Constitution of India came into effect. It is a national holiday and is celebrated with grand parades, cultural performances, and flag hoisting ceremonies in different parts of the country.
Conclusion:
Both Assertion (A) and Reason (R) are true. However, Reason (R) is not the correct explanation of Assertion (A). The reason simply states the fact that 26th January is celebrated as Republic Day, but it does not explain why the Indian Constitution came into force on that day. The adoption and enactment of the Constitution on 26th January, 1950, were based on historical and political considerations and not solely because of the celebration of Republic Day. Hence, the correct answer is option 'B' - Both A and R are true but R is not the correct explanation of A.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Leaves of plants are green.
Reason (R): Plants contain chromoplasts, the green pigment.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Leaves of plants are green.
Reason (R): Plants contain chromoplasts, the green pigment.
Assertion (A): Leaves of plants are green.
Reason (R): Plants contain chromoplasts, the green pigment.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
|
Jhanvi Kumar answered |
Assertion (A): Leaves of plants are green.
Reason (R): Plants contain chromoplasts, the green pigment.
The correct answer for this question is option 'C', which states that Assertion (A) is true but Reason (R) is false.
Explanation:
- The Assertion (A) states that leaves of plants are green. This is a well-known fact and is true. The green color of leaves is due to the presence of a pigment called chlorophyll, which is responsible for photosynthesis.
- The Reason (R) states that plants contain chromoplasts, the green pigment. This statement is incorrect. Chromoplasts are a type of plastids found in plants, responsible for the synthesis and accumulation of pigments other than chlorophyll. They are responsible for the red, orange, and yellow colors seen in fruits, flowers, and some leaves, but not green. The green color in plants is specifically due to chlorophyll, which is found in chloroplasts.
- Chloroplasts are specialized organelles found in plant cells that contain chlorophyll and are responsible for photosynthesis. These organelles capture sunlight and convert it into energy, which is used by the plant for growth and development.
- Chlorophyll is a green pigment that absorbs light in the blue and red regions of the electromagnetic spectrum and reflects green light, giving leaves their characteristic green color.
- The presence of chlorophyll in chloroplasts enables plants to capture light energy and convert it into chemical energy through photosynthesis. This process is crucial for the survival of plants and the production of oxygen and carbohydrates.
- In conclusion, Assertion (A) is true because leaves of plants are indeed green. However, Reason (R) is false because plants do not contain chromoplasts responsible for the green color. Instead, chlorophyll in chloroplasts is responsible for the green color of leaves.
Reason (R): Plants contain chromoplasts, the green pigment.
The correct answer for this question is option 'C', which states that Assertion (A) is true but Reason (R) is false.
Explanation:
- The Assertion (A) states that leaves of plants are green. This is a well-known fact and is true. The green color of leaves is due to the presence of a pigment called chlorophyll, which is responsible for photosynthesis.
- The Reason (R) states that plants contain chromoplasts, the green pigment. This statement is incorrect. Chromoplasts are a type of plastids found in plants, responsible for the synthesis and accumulation of pigments other than chlorophyll. They are responsible for the red, orange, and yellow colors seen in fruits, flowers, and some leaves, but not green. The green color in plants is specifically due to chlorophyll, which is found in chloroplasts.
- Chloroplasts are specialized organelles found in plant cells that contain chlorophyll and are responsible for photosynthesis. These organelles capture sunlight and convert it into energy, which is used by the plant for growth and development.
- Chlorophyll is a green pigment that absorbs light in the blue and red regions of the electromagnetic spectrum and reflects green light, giving leaves their characteristic green color.
- The presence of chlorophyll in chloroplasts enables plants to capture light energy and convert it into chemical energy through photosynthesis. This process is crucial for the survival of plants and the production of oxygen and carbohydrates.
- In conclusion, Assertion (A) is true because leaves of plants are indeed green. However, Reason (R) is false because plants do not contain chromoplasts responsible for the green color. Instead, chlorophyll in chloroplasts is responsible for the green color of leaves.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Ventilators are provided near the roof.
Reason (R): Conduction takes place better near the roof.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Ventilators are provided near the roof.
Reason (R): Conduction takes place better near the roof.
Assertion (A): Ventilators are provided near the roof.
Reason (R): Conduction takes place better near the roof.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
|
Shilpa Chavan answered |
Assertion (A): Ventilators are provided near the roof.
Reason (R): Conduction takes place better near the roof.
The correct answer for this question is option 'C' - A is true but R is false.
Explanation:
Ventilators are provided near the roof to allow the flow of fresh air into a space and remove stale air. This helps in maintaining proper air circulation and ventilation within a room or building. The primary purpose of ventilators is to promote the exchange of indoor and outdoor air, ensuring a constant supply of fresh air.
However, the reason given - "Conduction takes place better near the roof" - is not correct. Conduction is the transfer of heat or energy through direct contact between objects or substances. It is not related to the placement of ventilators near the roof.
Conduction occurs when there is a temperature difference between two objects in contact with each other, and heat energy flows from the hotter object to the colder one. The rate of conduction depends on various factors such as the thermal conductivity of the materials involved, the temperature difference, and the thickness of the objects.
The placement of ventilators near the roof is primarily for the purpose of ensuring proper air circulation and ventilation, not specifically related to conduction. Ventilation helps in removing stale air, odors, and pollutants from a space, and allows fresh air to enter. It also helps in controlling humidity levels and preventing the buildup of moisture, which can lead to mold and other issues.
In conclusion, while the assertion that ventilators are provided near the roof is true, the reason given for this - that conduction takes place better near the roof - is false. The correct answer is option 'C' - A is true but R is false.
Reason (R): Conduction takes place better near the roof.
The correct answer for this question is option 'C' - A is true but R is false.
Explanation:
Ventilators are provided near the roof to allow the flow of fresh air into a space and remove stale air. This helps in maintaining proper air circulation and ventilation within a room or building. The primary purpose of ventilators is to promote the exchange of indoor and outdoor air, ensuring a constant supply of fresh air.
However, the reason given - "Conduction takes place better near the roof" - is not correct. Conduction is the transfer of heat or energy through direct contact between objects or substances. It is not related to the placement of ventilators near the roof.
Conduction occurs when there is a temperature difference between two objects in contact with each other, and heat energy flows from the hotter object to the colder one. The rate of conduction depends on various factors such as the thermal conductivity of the materials involved, the temperature difference, and the thickness of the objects.
The placement of ventilators near the roof is primarily for the purpose of ensuring proper air circulation and ventilation, not specifically related to conduction. Ventilation helps in removing stale air, odors, and pollutants from a space, and allows fresh air to enter. It also helps in controlling humidity levels and preventing the buildup of moisture, which can lead to mold and other issues.
In conclusion, while the assertion that ventilators are provided near the roof is true, the reason given for this - that conduction takes place better near the roof - is false. The correct answer is option 'C' - A is true but R is false.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Amoebiasis is an occupational disease.
Reason (R): Amoebiasis is caused by inhalation of asbestos duet.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'E'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Amoebiasis is an occupational disease.
Reason (R): Amoebiasis is caused by inhalation of asbestos duet.
Assertion (A): Amoebiasis is an occupational disease.
Reason (R): Amoebiasis is caused by inhalation of asbestos duet.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
|
Poulomi Sengupta answered |
Assertion (A): Amoebiasis is an occupational disease.
Reason (R): Amoebiasis is caused by inhalation of asbestos dust.
Explanation:
Amoebiasis is a gastrointestinal infection caused by the microscopic parasite Entamoeba histolytica. It is typically transmitted through ingestion of contaminated food or water. As per the given reason, it states that amoebiasis is caused by inhalation of asbestos dust, which is incorrect. Asbestos dust exposure is associated with respiratory diseases such as asbestosis and lung cancer, but it is not linked to amoebiasis. Therefore, both the assertion and reason are false.
Hence, the correct answer is option E - Both A and R are false.
Reason (R): Amoebiasis is caused by inhalation of asbestos dust.
Explanation:
Amoebiasis is a gastrointestinal infection caused by the microscopic parasite Entamoeba histolytica. It is typically transmitted through ingestion of contaminated food or water. As per the given reason, it states that amoebiasis is caused by inhalation of asbestos dust, which is incorrect. Asbestos dust exposure is associated with respiratory diseases such as asbestosis and lung cancer, but it is not linked to amoebiasis. Therefore, both the assertion and reason are false.
Hence, the correct answer is option E - Both A and R are false.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The use of chlorofluorocarbons is banned throughout the world nowadays.
Reason (R): These chemicals cause skin cancer.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): The use of chlorofluorocarbons is banned throughout the world nowadays.
Reason (R): These chemicals cause skin cancer.
Assertion (A): The use of chlorofluorocarbons is banned throughout the world nowadays.
Reason (R): These chemicals cause skin cancer.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
|
Gargi Kaur answered |
Assertion (A): The use of chlorofluorocarbons is banned throughout the world nowadays.
Reason (R): These chemicals cause skin cancer.
The correct answer is option 'C'. Let's analyze the statements individually to understand why.
Explanation:
Assertion (A): The use of chlorofluorocarbons is banned throughout the world nowadays.
Chlorofluorocarbons (CFCs) are a class of chemical compounds that contain carbon, chlorine, and fluorine. They were commonly used in aerosol propellants, refrigerants, and foam-blowing agents. However, the use of CFCs has been significantly reduced and banned globally due to their harmful effects on the environment, particularly on the ozone layer.
The Montreal Protocol, an international treaty signed in 1987, aimed to phase out the production and consumption of ozone-depleting substances, including CFCs. This protocol has been ratified by almost every country in the world, making the use of CFCs illegal.
Reason (R): These chemicals cause skin cancer.
While CFCs are harmful to the ozone layer, they are not directly linked to causing skin cancer. The primary reason for the ban on CFCs is their destructive impact on the ozone layer in the stratosphere. When released into the atmosphere, CFCs can rise to the stratosphere, where they break down and release chlorine atoms. These chlorine atoms catalytically destroy ozone molecules, leading to the thinning of the ozone layer.
The depletion of the ozone layer has significant consequences for human health and the environment. The ozone layer acts as a protective shield against harmful ultraviolet (UV) radiation from the sun. Increased UV radiation reaching the Earth's surface due to ozone depletion can cause various health issues, including skin cancer, cataracts, and immune system suppression.
However, it is important to note that CFCs themselves do not cause skin cancer directly. The ban on CFCs is primarily focused on protecting the ozone layer and preventing its depletion, which indirectly reduces the risk of skin cancer and other health problems associated with increased UV radiation.
In conclusion, while both Assertion (A) and Reason (R) are true, Reason (R) is not the correct explanation of Assertion (A). The ban on chlorofluorocarbons is primarily driven by their harmful impact on the ozone layer rather than their direct association with causing skin cancer.
Reason (R): These chemicals cause skin cancer.
The correct answer is option 'C'. Let's analyze the statements individually to understand why.
Explanation:
Assertion (A): The use of chlorofluorocarbons is banned throughout the world nowadays.
Chlorofluorocarbons (CFCs) are a class of chemical compounds that contain carbon, chlorine, and fluorine. They were commonly used in aerosol propellants, refrigerants, and foam-blowing agents. However, the use of CFCs has been significantly reduced and banned globally due to their harmful effects on the environment, particularly on the ozone layer.
The Montreal Protocol, an international treaty signed in 1987, aimed to phase out the production and consumption of ozone-depleting substances, including CFCs. This protocol has been ratified by almost every country in the world, making the use of CFCs illegal.
Reason (R): These chemicals cause skin cancer.
While CFCs are harmful to the ozone layer, they are not directly linked to causing skin cancer. The primary reason for the ban on CFCs is their destructive impact on the ozone layer in the stratosphere. When released into the atmosphere, CFCs can rise to the stratosphere, where they break down and release chlorine atoms. These chlorine atoms catalytically destroy ozone molecules, leading to the thinning of the ozone layer.
The depletion of the ozone layer has significant consequences for human health and the environment. The ozone layer acts as a protective shield against harmful ultraviolet (UV) radiation from the sun. Increased UV radiation reaching the Earth's surface due to ozone depletion can cause various health issues, including skin cancer, cataracts, and immune system suppression.
However, it is important to note that CFCs themselves do not cause skin cancer directly. The ban on CFCs is primarily focused on protecting the ozone layer and preventing its depletion, which indirectly reduces the risk of skin cancer and other health problems associated with increased UV radiation.
In conclusion, while both Assertion (A) and Reason (R) are true, Reason (R) is not the correct explanation of Assertion (A). The ban on chlorofluorocarbons is primarily driven by their harmful impact on the ozone layer rather than their direct association with causing skin cancer.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): We feel colder on mountains than on plains.
Reason (R): Temperature decreases with altitudes.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'A'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): We feel colder on mountains than on plains.
Reason (R): Temperature decreases with altitudes.
Assertion (A): We feel colder on mountains than on plains.
Reason (R): Temperature decreases with altitudes.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
Rounak Iyer answered |
Understanding the Assertion and Reason
The relationship between the assertion (A) and the reason (R) can be understood through the principles of atmospheric science.
Assertion (A): We feel colder on mountains than on plains.
- This statement is true. People often experience a drop in temperature when they ascend to higher altitudes, such as mountains, compared to lower regions like plains.
Reason (R): Temperature decreases with altitude.
- This statement is also true. The temperature in the atmosphere generally decreases as altitude increases due to the thinning of the air and lower air pressure. This phenomenon is supported by the lapse rate, which describes how temperature decreases with elevation.
Relationship Between A and R
- The reasoning directly explains the assertion:
- As altitude increases in mountainous areas, the air temperature drops, leading to a colder sensation for individuals.
Conclusion
- Since both statements are true and R provides the correct explanation for A, the correct answer is option 'A':
- Both A and R are true, and R is the correct explanation of A.
This logical connection underlines the principle that higher altitudes result in lower temperatures, which is a fundamental concept in meteorology and geography, crucial for understanding climate variations in different terrains.
The relationship between the assertion (A) and the reason (R) can be understood through the principles of atmospheric science.
Assertion (A): We feel colder on mountains than on plains.
- This statement is true. People often experience a drop in temperature when they ascend to higher altitudes, such as mountains, compared to lower regions like plains.
Reason (R): Temperature decreases with altitude.
- This statement is also true. The temperature in the atmosphere generally decreases as altitude increases due to the thinning of the air and lower air pressure. This phenomenon is supported by the lapse rate, which describes how temperature decreases with elevation.
Relationship Between A and R
- The reasoning directly explains the assertion:
- As altitude increases in mountainous areas, the air temperature drops, leading to a colder sensation for individuals.
Conclusion
- Since both statements are true and R provides the correct explanation for A, the correct answer is option 'A':
- Both A and R are true, and R is the correct explanation of A.
This logical connection underlines the principle that higher altitudes result in lower temperatures, which is a fundamental concept in meteorology and geography, crucial for understanding climate variations in different terrains.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): An atom is neutral despite the charged particles in it.
Reason (R): The neutrons do not have any charge.- a)A is true but R is false.
- b)A is false but R is true.
- c)Both A and R are false.
- d)Both A and R are true but R is not the correct explanation of A.
- e)Both A and R are true and R is the correct explanation of A.
Correct answer is option 'D'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): An atom is neutral despite the charged particles in it.
Reason (R): The neutrons do not have any charge.
Reason (R): The neutrons do not have any charge.
a)
A is true but R is false.
b)
A is false but R is true.
c)
Both A and R are false.
d)
Both A and R are true but R is not the correct explanation of A.
e)
Both A and R are true and R is the correct explanation of A.
|
Anirban Sengupta answered |
Assertion (A): An atom is neutral despite the charged particles in it.
Reason (R): The neutrons do not have any charge.
Explanation:
An atom is composed of three subatomic particles: protons, neutrons, and electrons. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge.
- The atom as a whole is neutral:
- The protons and electrons in an atom carry equal but opposite charges.
- The positive charge of the protons is balanced by the negative charge of the electrons.
- As a result, the atom as a whole has no net charge and is electrically neutral.
- Assertion (A) is true:
- Despite the presence of charged particles (protons and electrons) in an atom, the atom as a whole does not have a net charge.
- This is because the number of protons, which determines the atomic number of an element, is equal to the number of electrons in a neutral atom.
- Reason (R) is true:
- Neutrons are electrically neutral particles.
- Neutrons do not possess any charge (positive or negative).
- They are found in the nucleus of an atom along with protons.
- The absence of charge on neutrons contributes to the overall neutral charge of an atom.
- However, Reason (R) is not the correct explanation of Assertion (A):
- While the reason correctly states that neutrons have no charge, it does not explain why an atom is neutral despite the presence of charged particles.
- The neutrality of an atom is a result of the equal number of protons and electrons, not solely due to the lack of charge on neutrons.
Therefore, the correct answer is option 'D' - Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
Reason (R): The neutrons do not have any charge.
Explanation:
An atom is composed of three subatomic particles: protons, neutrons, and electrons. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge.
- The atom as a whole is neutral:
- The protons and electrons in an atom carry equal but opposite charges.
- The positive charge of the protons is balanced by the negative charge of the electrons.
- As a result, the atom as a whole has no net charge and is electrically neutral.
- Assertion (A) is true:
- Despite the presence of charged particles (protons and electrons) in an atom, the atom as a whole does not have a net charge.
- This is because the number of protons, which determines the atomic number of an element, is equal to the number of electrons in a neutral atom.
- Reason (R) is true:
- Neutrons are electrically neutral particles.
- Neutrons do not possess any charge (positive or negative).
- They are found in the nucleus of an atom along with protons.
- The absence of charge on neutrons contributes to the overall neutral charge of an atom.
- However, Reason (R) is not the correct explanation of Assertion (A):
- While the reason correctly states that neutrons have no charge, it does not explain why an atom is neutral despite the presence of charged particles.
- The neutrality of an atom is a result of the equal number of protons and electrons, not solely due to the lack of charge on neutrons.
Therefore, the correct answer is option 'D' - Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Akbar founded Din-e-Ilahi.
Reason (R): He was motivated by self glorification.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Akbar founded Din-e-Ilahi.
Reason (R): He was motivated by self glorification.
Assertion (A): Akbar founded Din-e-Ilahi.
Reason (R): He was motivated by self glorification.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
|
Aashna Desai answered |
Assertion (A): Akbar founded Din-e-Ilahi.
Reason (R): He was motivated by self glorification.
To analyze this question and determine the correct answer, we need to examine the statements provided and their relationship with each other.
The assertion states that Akbar founded Din-e-Ilahi, while the reason states that he was motivated by self glorification. Let's delve deeper into each statement to evaluate their accuracy and logical connection.
Akbar was indeed responsible for the founding of Din-e-Ilahi. Din-e-Ilahi, translated as "Divine Faith," was a syncretic religion created by Akbar in the late 16th century. It aimed to blend elements of various existing religions and philosophies, including Islam, Hinduism, Jainism, Christianity, and Zoroastrianism. Akbar's intention behind this new faith was to foster religious harmony and create a sense of unity among his diverse subjects.
The reason provided states that Akbar was motivated by self glorification in establishing Din-e-Ilahi. This reason, however, is not accurate. Akbar's motivations for founding Din-e-Ilahi were primarily driven by his quest for religious synthesis, tolerance, and inclusivity. He sought to create a common platform where people from different religious backgrounds could come together and transcend their differences.
The correct answer to this question is option 'C' - Assertion (A) is true, but Reason (R) is false.
The reason provided does not correctly explain the assertion because it inaccurately portrays Akbar's motivations. While it is essential to critically analyze historical events and figures, it is equally important to ensure that the explanations and reasons provided are accurate and supported by evidence.
By evaluating the statements individually, we can conclude that Akbar did indeed found Din-e-Ilahi, but his motivations were not driven by self glorification as mentioned in the reason.
Reason (R): He was motivated by self glorification.
To analyze this question and determine the correct answer, we need to examine the statements provided and their relationship with each other.
Understanding the Statements:
The assertion states that Akbar founded Din-e-Ilahi, while the reason states that he was motivated by self glorification. Let's delve deeper into each statement to evaluate their accuracy and logical connection.
Evaluating the Assertion (A):
Akbar was indeed responsible for the founding of Din-e-Ilahi. Din-e-Ilahi, translated as "Divine Faith," was a syncretic religion created by Akbar in the late 16th century. It aimed to blend elements of various existing religions and philosophies, including Islam, Hinduism, Jainism, Christianity, and Zoroastrianism. Akbar's intention behind this new faith was to foster religious harmony and create a sense of unity among his diverse subjects.
Evaluating the Reason (R):
The reason provided states that Akbar was motivated by self glorification in establishing Din-e-Ilahi. This reason, however, is not accurate. Akbar's motivations for founding Din-e-Ilahi were primarily driven by his quest for religious synthesis, tolerance, and inclusivity. He sought to create a common platform where people from different religious backgrounds could come together and transcend their differences.
The Correct Answer:
The correct answer to this question is option 'C' - Assertion (A) is true, but Reason (R) is false.
The reason provided does not correctly explain the assertion because it inaccurately portrays Akbar's motivations. While it is essential to critically analyze historical events and figures, it is equally important to ensure that the explanations and reasons provided are accurate and supported by evidence.
By evaluating the statements individually, we can conclude that Akbar did indeed found Din-e-Ilahi, but his motivations were not driven by self glorification as mentioned in the reason.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Pipes carrying water often burst in cold countries during severe winter.
Reason (R): Water expands on freezing.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'A'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Pipes carrying water often burst in cold countries during severe winter.
Reason (R): Water expands on freezing.
Assertion (A): Pipes carrying water often burst in cold countries during severe winter.
Reason (R): Water expands on freezing.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true but R is not the correct explanation of A.
c)
A is true but R is false.
d)
A is false but R is true.
e)
Both A and R are false.
|
Nikhil Saini answered |
Assertion and Reason Analysis:
Assertion (A): Pipes carrying water often burst in cold countries during severe winter.
Reason (R): Water expands on freezing.
Explanation:
- Both A and R are true: It is a known fact that pipes carrying water can burst in cold countries during severe winter due to the expansion of water when it freezes.
- R is the correct explanation of A: The reason provided (water expands on freezing) directly links to the assertion (pipes bursting in cold countries). When water freezes, it expands and exerts pressure on the walls of the pipes, causing them to burst.
Therefore, in this case, both the assertion and reason are true, and the reason (water expanding on freezing) serves as the correct explanation for why pipes carrying water often burst in cold countries during severe winter.
Assertion (A): Pipes carrying water often burst in cold countries during severe winter.
Reason (R): Water expands on freezing.
Explanation:
- Both A and R are true: It is a known fact that pipes carrying water can burst in cold countries during severe winter due to the expansion of water when it freezes.
- R is the correct explanation of A: The reason provided (water expands on freezing) directly links to the assertion (pipes bursting in cold countries). When water freezes, it expands and exerts pressure on the walls of the pipes, causing them to burst.
Therefore, in this case, both the assertion and reason are true, and the reason (water expanding on freezing) serves as the correct explanation for why pipes carrying water often burst in cold countries during severe winter.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Sprouting should not done before consuming the grains.
Reason (R): Sprouting kills many vital vitamins.- a)Both A and R are false.
- b)A is false but R is true.
- c)A is true but R is false.
- d)Both A and R are true but R is not the correct explanation of A.
- e)Both A and R are true and R is the correct explanation of A.
Correct answer is option 'A'. Can you explain this answer?
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Sprouting should not done before consuming the grains.
Reason (R): Sprouting kills many vital vitamins.
Assertion (A): Sprouting should not done before consuming the grains.
Reason (R): Sprouting kills many vital vitamins.
a)
Both A and R are false.
b)
A is false but R is true.
c)
A is true but R is false.
d)
Both A and R are true but R is not the correct explanation of A.
e)
Both A and R are true and R is the correct explanation of A.
|
Mansi Bajaj answered |
Explanation:
Assertion (A):
- Sprouting should not be done before consuming the grains.
Reason (R):
- Sprouting kills many vital vitamins.
Explanation:
Assertion (A) is false:
- Sprouting actually enhances the nutritional value of grains by increasing the availability of certain nutrients and reducing anti-nutrients. It also makes the grains easier to digest.
Reason (R) is true:
- While sprouting does increase the availability of some nutrients, it can also lead to a loss of certain vitamins during the sprouting process. However, the overall nutritional benefits of sprouting outweigh the loss of some vitamins.
Therefore, option 'A' is the correct answer as Assertion (A) is false and Reason (R) is true.
Chapter doubts & questions for Assertion & Reason - CSAT Preparation 2025 is part of UPSC CSE exam preparation. The chapters have been prepared according to the UPSC CSE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for UPSC CSE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Assertion & Reason - CSAT Preparation in English & Hindi are available as part of UPSC CSE exam.
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