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All questions of August Week 4 for Class 10 Exam
Which one of the following metals can be obtained from Bauxite?- a)Aluminium
- b)Copper
- c)Iron
- d)Silver
Correct answer is option 'A'. Can you explain this answer?
Which one of the following metals can be obtained from Bauxite?
a)
Aluminium
b)
Copper
c)
Iron
d)
Silver
|
|
Ram Mohith answered |
Bauxite (Al2O3.nH2O) is an oxide ore of Aluminium...
Mark the odd one out:- a)Auxin
- b)Abscisic acid
- c)Cytokinin
- d)Gibberellins
Correct answer is option 'B'. Can you explain this answer?
Mark the odd one out:
a)
Auxin
b)
Abscisic acid
c)
Cytokinin
d)
Gibberellins
|
|
Harshit Agrawal answered |
Correct option is B as auxin , cytokinin and gibberellins are growth promoting plant hormones while Abscisic acid is the growth inhibitior plant hormone.
Match the following-
Column I Column II
1. Hormones i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth- a)1 – iv; 2 – v; 3 – ii; 4 – iii; 5 – i
- b)1 – v; 2 – iv; 3 – ii; 4 – iii; 5 – i
- c)1- iv; 2 – iii; 3 – iv; 4 – ii; 5 – i
- d)1 – iv; 2 – v; 3 – iii; 4 – ii; 5 – i
Correct answer is option 'A'. Can you explain this answer?
Match the following-
Column I Column II
1. Hormones i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth
Column I Column II
1. Hormones i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth
a)
1 – iv; 2 – v; 3 – ii; 4 – iii; 5 – i
b)
1 – v; 2 – iv; 3 – ii; 4 – iii; 5 – i
c)
1- iv; 2 – iii; 3 – iv; 4 – ii; 5 – i
d)
1 – iv; 2 – v; 3 – iii; 4 – ii; 5 – i
|
Amit Sharma answered |
Hormones synthesized at places away from where they act. Growth is seedling germination. Chemotropic is the growth of pollen tubes towards ovules. Root is positively geotrophic. Shoot is positively phototropic.
Minerals need to be conserved because
(i) They are renewable.
(ii) They are depleting rapidly.
(iii) They are needed for the country’s industrial development.
(iv) Their formation is very fast.- a)(i) and (ii)
- b)(ii) and (iii)
- c)(iii) and (iv)
- d)All of the above
Correct answer is option 'B'. Can you explain this answer?
Minerals need to be conserved because
(i) They are renewable.
(ii) They are depleting rapidly.
(iii) They are needed for the country’s industrial development.
(iv) Their formation is very fast.
(i) They are renewable.
(ii) They are depleting rapidly.
(iii) They are needed for the country’s industrial development.
(iv) Their formation is very fast.
a)
(i) and (ii)
b)
(ii) and (iii)
c)
(iii) and (iv)
d)
All of the above
|
EduRev Class 10 answered |
Explanation:
The correct answer is option B: (ii) and (iii).
Reasoning:
- Minerals are not renewable resources. They are formed over millions of years through geological processes and cannot be replenished within a human lifespan.
- Minerals are depleting rapidly due to excessive extraction and consumption. This is mainly because the rate of extraction is much higher than the rate of formation.
- Minerals are essential for a country's industrial development. They are used in various industries such as manufacturing, construction, energy production, and technology.
- The formation of minerals is not fast. It takes geological processes such as erosion, weathering, and deposition over long periods of time for minerals to form.
Therefore, the correct answer is option B: (ii) and (iii) - Minerals need to be conserved because they are depleting rapidly and they are needed for the country's industrial development.
The correct answer is option B: (ii) and (iii).
Reasoning:
- Minerals are not renewable resources. They are formed over millions of years through geological processes and cannot be replenished within a human lifespan.
- Minerals are depleting rapidly due to excessive extraction and consumption. This is mainly because the rate of extraction is much higher than the rate of formation.
- Minerals are essential for a country's industrial development. They are used in various industries such as manufacturing, construction, energy production, and technology.
- The formation of minerals is not fast. It takes geological processes such as erosion, weathering, and deposition over long periods of time for minerals to form.
Therefore, the correct answer is option B: (ii) and (iii) - Minerals need to be conserved because they are depleting rapidly and they are needed for the country's industrial development.
Which of the following metals is a major constituent of non-ferrous minerals?- a)Iron
- b)Gold
- c)Manganese
- d)Chromium
Correct answer is option 'B'. Can you explain this answer?
a)
Iron
b)
Gold
c)
Manganese
d)
Chromium
|
Madhukar sethi answered |
Understanding Non-Ferrous Metals
Non-ferrous metals are those that do not contain significant amounts of iron. They are valued for their unique properties, such as resistance to corrosion, lightweight, and high conductivity.
Key Characteristics of Non-Ferrous Metals:
- Corrosion Resistance: Non-ferrous metals are less likely to rust or corrode compared to ferrous metals.
- Lightweight: Many non-ferrous metals, such as aluminum and titanium, are significantly lighter than iron.
- High Conductivity: Metals like copper and aluminum are excellent conductors of electricity.
Major Non-Ferrous Metals
Among the options provided, gold (option B) stands out as a major non-ferrous metal. Here's why:
- Gold's Significance: Gold is a precious metal that is highly sought after for its rarity, beauty, and value. It is widely used in jewelry, electronics, and as a form of currency.
- Non-Ferrous Classification: As a non-ferrous metal, gold does not rust and is highly resistant to tarnish and corrosion, making it ideal for various applications.
Comparison with Other Options
- Iron: This is a ferrous metal and is the primary component in steel, which is not classified as non-ferrous.
- Manganese: While it is used in steel production and alloys, it does not qualify as a major non-ferrous metal.
- Chromium: Like manganese, chromium is primarily associated with steel and ferrous metallurgy.
Conclusion
Given these distinctions, gold is rightly identified as a major constituent of non-ferrous minerals, making it the correct answer to the question.
Non-ferrous metals are those that do not contain significant amounts of iron. They are valued for their unique properties, such as resistance to corrosion, lightweight, and high conductivity.
Key Characteristics of Non-Ferrous Metals:
- Corrosion Resistance: Non-ferrous metals are less likely to rust or corrode compared to ferrous metals.
- Lightweight: Many non-ferrous metals, such as aluminum and titanium, are significantly lighter than iron.
- High Conductivity: Metals like copper and aluminum are excellent conductors of electricity.
Major Non-Ferrous Metals
Among the options provided, gold (option B) stands out as a major non-ferrous metal. Here's why:
- Gold's Significance: Gold is a precious metal that is highly sought after for its rarity, beauty, and value. It is widely used in jewelry, electronics, and as a form of currency.
- Non-Ferrous Classification: As a non-ferrous metal, gold does not rust and is highly resistant to tarnish and corrosion, making it ideal for various applications.
Comparison with Other Options
- Iron: This is a ferrous metal and is the primary component in steel, which is not classified as non-ferrous.
- Manganese: While it is used in steel production and alloys, it does not qualify as a major non-ferrous metal.
- Chromium: Like manganese, chromium is primarily associated with steel and ferrous metallurgy.
Conclusion
Given these distinctions, gold is rightly identified as a major constituent of non-ferrous minerals, making it the correct answer to the question.
Mark the odd one out:- a)Auxin
- b)Abscisic acid
- c)Cytokinin
- d)Gibberellins
Correct answer is option 'B'. Can you explain this answer?
Mark the odd one out:
a)
Auxin
b)
Abscisic acid
c)
Cytokinin
d)
Gibberellins
|
Keerthana Rane answered |
Auxin, cytokinin and gibberellins are growth promoting plant hormones while Abscisic acid is the growth inhibitior plant hormone.
Assertion: Minerals are an indispensable part of our lives.
Reason: Almost everything we use from a tiny pin to towering building all are made up of minerals.- 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 correct but R is wrong
- d)A is wrong but R is correct
Correct answer is option 'A'. Can you explain this answer?
Assertion: Minerals are an indispensable part of our lives.
Reason: Almost everything we use from a tiny pin to towering building all are made up of minerals.
Reason: Almost everything we use from a tiny pin to towering building all are made up of minerals.
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 correct but R is wrong
d)
A is wrong but R is correct
|
Soumyaneel Mukherjee answered |
Yeah it is right.
Minerals are an indispensable part of our lives. Almost everything we use are made up of minerals. There is hardly any walk of life where we do not need minerals. Both assertion and reason statements are true and they are very closely related The .Reason is just the elaboration of assertion statement.
Hence correct answer is option A
Minerals are an indispensable part of our lives. Almost everything we use are made up of minerals. There is hardly any walk of life where we do not need minerals. Both assertion and reason statements are true and they are very closely related The .Reason is just the elaboration of assertion statement.
Hence correct answer is option A
Which one of the following places is known for lignite deposits?- a)Khetri
- b)Neyveli
- c)Bailadila
- d)Bokaro
Correct answer is option 'B'. Can you explain this answer?
Which one of the following places is known for lignite deposits?
a)
Khetri
b)
Neyveli
c)
Bailadila
d)
Bokaro
|
Saptarshi Kulkarni answered |
Lignite Deposits in Neyveli
Introduction:
Lignite is a low-grade coal which is often referred to as brown coal. It is considered to be the lowest rank of coal because it is formed under the lowest heat and pressure. Neyveli is one of the places in India where lignite deposits are found.
Location:
Neyveli is a township located in the Cuddalore district of Tamil Nadu, India. It is situated about 60 kilometers west of Pondicherry and 185 kilometers southwest of Chennai.
Lignite Deposits:
Neyveli is known for its lignite deposits, which are estimated to be around 4,000 million tonnes. The lignite deposits are found in two blocks, Neyveli and Barsingsar. The Neyveli lignite deposit covers an area of about 600 square kilometers and is believed to be the largest in India.
Mining:
Neyveli Lignite Corporation (NLC), a government-owned company, is responsible for mining the lignite deposits in Neyveli. The lignite is used as fuel to generate electricity in thermal power plants. NLC has three thermal power plants in Neyveli with a total installed capacity of 2,490 MW.
Employment:
The lignite mining industry in Neyveli provides employment to a large number of people. NLC is one of the largest employers in the region and provides direct and indirect employment to over 25,000 people.
Conclusion:
In conclusion, Neyveli is known for its lignite deposits, which are estimated to be around 4,000 million tonnes. The lignite is mined by Neyveli Lignite Corporation and is used as fuel to generate electricity in thermal power plants. The lignite mining industry provides employment to a large number of people in the region.
Introduction:
Lignite is a low-grade coal which is often referred to as brown coal. It is considered to be the lowest rank of coal because it is formed under the lowest heat and pressure. Neyveli is one of the places in India where lignite deposits are found.
Location:
Neyveli is a township located in the Cuddalore district of Tamil Nadu, India. It is situated about 60 kilometers west of Pondicherry and 185 kilometers southwest of Chennai.
Lignite Deposits:
Neyveli is known for its lignite deposits, which are estimated to be around 4,000 million tonnes. The lignite deposits are found in two blocks, Neyveli and Barsingsar. The Neyveli lignite deposit covers an area of about 600 square kilometers and is believed to be the largest in India.
Mining:
Neyveli Lignite Corporation (NLC), a government-owned company, is responsible for mining the lignite deposits in Neyveli. The lignite is used as fuel to generate electricity in thermal power plants. NLC has three thermal power plants in Neyveli with a total installed capacity of 2,490 MW.
Employment:
The lignite mining industry in Neyveli provides employment to a large number of people. NLC is one of the largest employers in the region and provides direct and indirect employment to over 25,000 people.
Conclusion:
In conclusion, Neyveli is known for its lignite deposits, which are estimated to be around 4,000 million tonnes. The lignite is mined by Neyveli Lignite Corporation and is used as fuel to generate electricity in thermal power plants. The lignite mining industry provides employment to a large number of people in the region.
Which one of the following metals is a precious one?- a)Copper
- b)Lead
- c)Iron ore
- d)Platinum
Correct answer is option 'D'. Can you explain this answer?
Which one of the following metals is a precious one?
a)
Copper
b)
Lead
c)
Iron ore
d)
Platinum
|
|
EduRev Class 10 answered |
Answer:
The precious metal among the given options is Platinum.
Explanation:
- Copper: Copper is a common metal that is widely used in various industries but it is not considered a precious metal.
- Lead: Lead is also a common metal but it is not classified as a precious metal.
- Iron ore: Iron ore refers to the raw material that contains iron, which is an essential metal but not considered a precious metal.
- Platinum: Platinum is a precious metal that is highly valued for its rarity, durability, and various industrial applications. It is widely used in jewelry, electrical contacts, catalytic converters, and other high-end products.
Therefore, the correct answer is option D: Platinum.
What is the primary function of Gibberellin in plants?- a)Inhibiting growth
- b)Promoting cell division
- c)Stimulating root growth
- d)Assisting stem growth
Correct answer is option 'D'. Can you explain this answer??
a)
Inhibiting growth
b)
Promoting cell division
c)
Stimulating root growth
d)
Assisting stem growth
|
|
Arjun Singh answered |
Understanding Gibberellin
Gibberellins are a group of plant hormones that play a crucial role in various growth processes. Their primary function is significantly related to stem growth.
Key Functions of Gibberellins:
- Stimulating Stem Elongation: Gibberellins promote cell elongation, particularly in stems, leading to increased height and overall growth of the plant. This process is essential for plants to reach light and optimize photosynthesis.
- Promoting Cell Division: While gibberellins do influence cell division, their primary role centers on elongation rather than dividing cells. This is why their effect is more pronounced in stems.
- Enhancing Germination: Gibberellins play a pivotal role in seed germination. They break dormancy and initiate the growth process by stimulating enzymes that mobilize stored food in seeds.
- Influencing Flowering: Some gibberellins can also affect flowering processes, particularly in certain plants that require specific conditions to bloom.
In Summary:
Gibberellins are primarily involved in:
- Promoting stem growth and elongation, allowing plants to achieve greater heights.
- Supporting other growth processes, but their most notable function is in enhancing stem development.
Thus, option 'D'—assisting stem growth—accurately describes the primary function of gibberellins in plants, distinguishing them from other growth hormones that may inhibit growth or focus on root development.
Gibberellins are a group of plant hormones that play a crucial role in various growth processes. Their primary function is significantly related to stem growth.
Key Functions of Gibberellins:
- Stimulating Stem Elongation: Gibberellins promote cell elongation, particularly in stems, leading to increased height and overall growth of the plant. This process is essential for plants to reach light and optimize photosynthesis.
- Promoting Cell Division: While gibberellins do influence cell division, their primary role centers on elongation rather than dividing cells. This is why their effect is more pronounced in stems.
- Enhancing Germination: Gibberellins play a pivotal role in seed germination. They break dormancy and initiate the growth process by stimulating enzymes that mobilize stored food in seeds.
- Influencing Flowering: Some gibberellins can also affect flowering processes, particularly in certain plants that require specific conditions to bloom.
In Summary:
Gibberellins are primarily involved in:
- Promoting stem growth and elongation, allowing plants to achieve greater heights.
- Supporting other growth processes, but their most notable function is in enhancing stem development.
Thus, option 'D'—assisting stem growth—accurately describes the primary function of gibberellins in plants, distinguishing them from other growth hormones that may inhibit growth or focus on root development.
Chapter doubts & questions for August Week 4 - Weekly Tests for Class 10 Preparation 2025 is part of Class 10 exam preparation. The chapters have been prepared according to the Class 10 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 10 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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