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OTET Exam  >  OTET Tests  >  OAVS TGT Science Mock Test - 3 - OTET MCQ

OAVS TGT Science Mock Test - 3 - OTET MCQ


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30 Questions MCQ Test - OAVS TGT Science Mock Test - 3

OAVS TGT Science Mock Test - 3 for OTET 2024 is part of OTET preparation. The OAVS TGT Science Mock Test - 3 questions and answers have been prepared according to the OTET exam syllabus.The OAVS TGT Science Mock Test - 3 MCQs are made for OTET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for OAVS TGT Science Mock Test - 3 below.
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OAVS TGT Science Mock Test - 3 - Question 1
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Which gas is released when ethyl alcohol reacts with sodium?

Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 1

Hydrogen gas is released.

OAVS TGT Science Mock Test - 3 - Question 2
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Give the symbol for the most reactive non-metal of group 17

Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 2

Fluorine is a halogen, which is group 17 on the periodic table, and the halogen are the most reactive.

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OAVS TGT Science Mock Test - 3 - Question 3
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The use of reflector in the solar cooker is to

Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 3

Reflectors (mirror) are used to focus the sun rays along with heat radiation inside the box to achieve high temperature.

OAVS TGT Science Mock Test - 3 - Question 4
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Males of honey bee colony are called :-
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 4

A drone is a male bee. Unlike the female worker bee, drones do not have stingers and gather neither nectar nor pollen. A drone's primary role is to mate with an unfertilized queen.

OAVS TGT Science Mock Test - 3 - Question 5
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When iron filings are added to a blue coloured copper sulphate solution, what colour change would you observe in solution?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 5

When Copper sulphate and iron nail are put together then the reactions occurs is: 

Fe(s) + CuSO₄ (aq) → FeSO₄(aq) + Cu (s)

As we know the colour copper sulphate solution is blue in colour. When we put iron nail in it , copper forms brown coloured coating on iron nail. The solution's colour also changes to light green colour. 

OAVS TGT Science Mock Test - 3 - Question 6
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Which of the following is incorrect statement regarding solar cooker? 
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 6
Incorrect Statement Regarding Solar Cooker:
A: It does not require solar cells to convert solar energy into electrical energy.
- This statement is correct. Solar cookers do not require solar cells to convert solar energy into electrical energy. Solar cells are used in solar panels to generate electricity, but solar cookers use the direct heat from the sun to cook food.
B: In it, cooking takes comparatively longer time.
- This statement is correct. Solar cookers rely on the sun's energy to heat up and cook food. Compared to traditional cooking methods, solar cookers generally take longer to cook food because they rely on the natural intensity of sunlight.
C: It requires neither fuel nor attention while cooking.
- This statement is correct. Solar cookers use the sun's energy as the fuel source and do not require any additional fuel, such as gas or electricity. Once the food is placed in the solar cooker, it can be left unattended as it cooks.
D: It is made from semiconductor material.
- This statement is incorrect. Solar cookers are not made from semiconductor material. They are typically made from reflective materials, such as metal or glass, which help concentrate and trap the sun's heat for cooking purposes.
Therefore, the incorrect statement is option D: "It is made from semiconductor material."
OAVS TGT Science Mock Test - 3 - Question 7
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What is a significant physical change experienced by girls during puberty?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 7
One significant physical change experienced by girls during puberty is breast enlargement. This is a result of the development of mammary glands and the accumulation of fatty tissue in the breasts. It is a normal part of female sexual maturation and a key characteristic of this phase.
OAVS TGT Science Mock Test - 3 - Question 8
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Which of the following sequences is truly a systemic circulation pathway?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 8
Systemic circulation carries blood from the heart to the tissues and then carries deoxygenated blood from tissues towards the heart. It helps to distribute the nutrients to different tissues and picks the carbon dioxide and waste. Systemic circulation involves the movement of blood from lungs to the left auricle through pulmonary vein, which is then pumped to the left ventricle. From here the blood goes through the aorta which divides into arteries. The arteries carry the blood towards the tissues and the deoxygenated blood is returned to the right auricle through veins. Thus the correct option is (b)
OAVS TGT Science Mock Test - 3 - Question 9
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The ability to reproduce is lost in a female after
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 9
Answer:
Explanation:
The ability to reproduce is lost in a female after menopause. Here's a detailed explanation:
Menopause:
- Menopause is a natural biological process that occurs in women. It is defined as the permanent cessation of menstruation and the end of the reproductive phase of a woman's life.
- Menopause usually occurs between the ages of 45 and 55, with the average age being around 51.
- During menopause, the ovaries stop producing eggs and the production of estrogen and progesterone decreases significantly.
Loss of Reproductive Ability:
- Menopause marks the end of a woman's reproductive years. After menopause, a woman can no longer become pregnant or give birth naturally.
- The loss of reproductive ability is due to the absence of eggs in the ovaries and the hormonal changes that occur during menopause.
Other Options:
- Fertilization: Fertilization refers to the fusion of a sperm and an egg to form a zygote. It is the initial step in the process of reproduction and does not lead to the loss of reproductive ability in females.
- Menstruation: Menstruation is the shedding of the uterine lining that occurs in women of reproductive age who are not pregnant. It is a monthly process and does not lead to the loss of reproductive ability.
- Gamete Formation: Gamete formation refers to the production of eggs (ova) and sperm. While the ability to produce gametes decreases with age, it does not result in the complete loss of reproductive ability.
In conclusion, the ability to reproduce is lost in a female after menopause, which is the permanent cessation of menstruation and the end of the reproductive phase of a woman's life.
OAVS TGT Science Mock Test - 3 - Question 10
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What does the milky appearance of lime water in the fermentation experiment indicate?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 10
The milky appearance of lime water in the fermentation experiment serves as an indicator of the release of carbon dioxide. This change occurs as a result of the carbon dioxide liberated from the sugar solution and yeast mixture during the fermentation process. The observation of lime water turning milky provides visual evidence of the production of CO2, showcasing one of the outcomes of the fermentation of sugar.
OAVS TGT Science Mock Test - 3 - Question 11
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A plant cell becomes swollen due to:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 11

Hypotonic solutions are the ones which have a lower concentration of solute than the inside the cell. Water diffuses into the cell to balance the solute concentration on either side (outside and inside) equal. Here the cell swells up due to entry of water by endosmosis. 

OAVS TGT Science Mock Test - 3 - Question 12
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Unsaturated carbon compounds on combustion give:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 12

Unsaturated hydrocarbons like ethyne also known as acetylene burn to produce a yellow sooty flame due to incomplete combustion in air.

The flame is sooty because the percentage of carbon is comparatively higher than that of alkanes and so does not get completely oxidized in air.

OAVS TGT Science Mock Test - 3 - Question 13
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A food chain always starts with-
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 13
Food Chain: Starting Point
The correct answer to the question is B: Photosynthesis. A food chain always starts with photosynthesis. Here is a detailed explanation of why photosynthesis is the starting point of a food chain:
1. What is Photosynthesis?
Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, water, and carbon dioxide into glucose and oxygen. It takes place in the chloroplasts of plant cells.
2. Role of Photosynthesis in the Food Chain:
Photosynthesis is the primary source of energy for all living organisms on Earth. It is responsible for the production of organic compounds, primarily glucose, which serves as food for the entire food chain.
3. Producers:
Green plants, also known as producers, are the first trophic level in a food chain. They use photosynthesis to convert sunlight energy into chemical energy (glucose). They are self-sustaining and do not depend on other organisms for their energy.
4. Herbivores:
Herbivores are the primary consumers in a food chain. They consume plants, utilizing the energy stored in the glucose produced through photosynthesis. Examples of herbivores include cows, rabbits, and deer.
5. Carnivores and Omnivores:
Carnivores and omnivores are the secondary and tertiary consumers in a food chain. They obtain energy by consuming herbivores or other carnivores. Carnivores solely depend on the consumption of other organisms for their energy needs.
6. Decomposers:
Decomposers, such as bacteria and fungi, play a crucial role in the food chain. They break down the remains of dead organisms, including plants and animals, releasing nutrients back into the ecosystem. These nutrients are then used by plants for photosynthesis, completing the cycle.
In conclusion, photosynthesis is the starting point of a food chain. It provides the energy needed for the growth and survival of all living organisms in an ecosystem. Without photosynthesis, the food chain would cease to exist, and life on Earth would not be sustainable.
OAVS TGT Science Mock Test - 3 - Question 14
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Which of the following metals is less reactive than hydrogen–
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 14

Metals that are less reactive than H are:- * Copper (Cu) * Mercury (Hg) * Silver (Ag) * Platinum(Pt) * Gold (Au)

OAVS TGT Science Mock Test - 3 - Question 15
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A person is suffering from both defects of vision, myopia and hypermetropia. He should use:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 15

Bifocal lenses are the lenses which are used for the people who suffer from both defects of vision that are hypermetropia and myopia, for those people who suffer from presbyopia or astigmatism. These lenses have two distinct powers and hence they serve two functions :- one is for distant vision and the other is for near vision. The lenses are divided into two parts. The upper part consists of concave lens which serves for distant vision at the lower part consists of convex lens which serves for near vision.

OAVS TGT Science Mock Test - 3 - Question 16
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The correct electron dot structure of a water molecule is
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 16

Oxygen atom has 6 valence electrons out of which 2 are involved in bonding with the 2 hydrogen atoms. Therefore water molecules has 2 bond pair of electrons and 2 lone pair(non bonded) of electrons and the correct electronic structure is (C).

OAVS TGT Science Mock Test - 3 - Question 17
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The total number of neutrons in 1224Mg2+is:​
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 17
Mass of Mg = no.of protons + no.of neutrons
no.of protons = 12 [ atomic no. = no.of protons = 12]
mass of Mg = 24 
so, no.of neutrons = 12

OAVS TGT Science Mock Test - 3 - Question 18
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The best conductor of electricity among the following is:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 18

Silver is the best conductor of electricity among the given options because it has a relatively low electrical resistivity. The electrons in silver are able to move more freely than those of the other elements, allowing electricity to flow more easily. This is due to the structure of the silver atom, which allows for more free electrons on the outer shell. Additionally, silver has a high thermal conductivity, meaning it is able to transfer heat quickly and efficiently.

OAVS TGT Science Mock Test - 3 - Question 19
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Which is the control centre of the cell?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 19
Nucleus is known as control room of the cell because it control all the functions that r taking place in cell
OAVS TGT Science Mock Test - 3 - Question 20
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The far point of a healthy person is
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 20

The near point of the eye is the minimum distance of the object from the eye, which can be seen distinctly without strain. For a normal human eye, this distance is 25 cm.

The far point of the eye is the maximum distance to which the eye can see the objects clearly. The far point of the normal human eye is infinity.

OAVS TGT Science Mock Test - 3 - Question 21
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Which of the following lacks nucleus-
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 21

Mature RBC lacks nucleus, hence RBC is called as red blood corpuscles.

OAVS TGT Science Mock Test - 3 - Question 22
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_________were not included in Mendeleev's periodic table.
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 22
There were many demerits in the Mendeleev periodic table,such as,isotopes were not included in his periodic table as the isotopes were discovered long after this discovery..

OAVS TGT Science Mock Test - 3 - Question 23
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When iron and sulphur are heated at high temperature
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 23
When iron and sulphur are heated at high temperature:
- Black coloured FeS is formed: When iron and sulphur are heated at high temperature, they react to form iron sulphide (FeS) which is black in color. This reaction is a synthesis reaction where iron and sulphur combine to form a new compound.
- Mixture of iron and sulphur is obtained: This statement is incorrect. Heating iron and sulphur at high temperature does not result in a simple mixture of iron and sulphur. Instead, a chemical reaction takes place and a new compound, iron sulphide, is formed.
- Yellow coloured iron sulphide is formed: This statement is incorrect. Iron sulphide (FeS) formed from the reaction of iron and sulphur is black in color, not yellow.
- They do not heat: This statement is incorrect. Iron and sulphur can be heated at high temperatures to initiate a chemical reaction between them.
Therefore, the correct answer is option A: Black coloured FeS is formed.
OAVS TGT Science Mock Test - 3 - Question 24
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Trapped heat inside the earth is known as
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 24

Explanation: Geothermal energy is the heat from the earth. It’s clean and sustainable. Resources of geothermal energy range from the ground to water and hot rock. The term geothermal originates from the Greek words.

OAVS TGT Science Mock Test - 3 - Question 25
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Genes are segments of:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 25

A gene is a segment of DNA that is passed down from parents to children and confers a trait to the offspring.

OAVS TGT Science Mock Test - 3 - Question 26
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NaHCO3 is chemical formula of –
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 26

Sodium bicarbonate, also commonly known as baking soda, is commonly seen as a white, fine powder and has the chemical formula NaHCO3. It has one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms. It is a very useful chemical that is alkaline in nature.

OAVS TGT Science Mock Test - 3 - Question 27
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Electricity from the ocean can be generated based on utilizing
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 27

The generation of electricity from the ocean is possible by harnessing the energy present in waves. This energy can be utilized to produce electricity through various methods such as wave energy converters. Additionally, the ocean also contains stored thermal energy, which can be tapped into to generate electricity using technologies like ocean thermal energy conversion (OTEC).
Here is a detailed explanation of the options:
A: Kinetic energy of the waves but not stored thermal energy
- Waves possess kinetic energy due to the motion of water particles. This energy can be harnessed using wave energy converters to generate electricity.
- However, this option states that stored thermal energy cannot be utilized, which is incorrect.
B: Stored thermal energy but not kinetic energy of the waves
- This option states that only stored thermal energy can be used to generate electricity from the ocean, neglecting the kinetic energy of the waves.
- Waves have significant kinetic energy that can be converted into electricity, making this option incorrect.
C: Kinetic energy of the waves as well as stored thermal energy
- This option correctly states that both kinetic energy of the waves and stored thermal energy can be utilized for electricity generation.
- Wave energy converters can harness the kinetic energy of waves, while OTEC systems can extract heat from the ocean's thermal gradient to generate power.
D: Neither kinetic energy of the waves nor stored thermal energy
- This option states that both kinetic energy of the waves and stored thermal energy cannot be used for electricity generation, which is incorrect.
Therefore, the correct answer is option C: Kinetic energy of the waves as well as stored thermal energy.
OAVS TGT Science Mock Test - 3 - Question 28
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The power generated in a windmill
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 28

The power generated in a windmill depends on the velocity of wind because power is generated by the wind. The more is the velocity of the wind, the more will be the power generated.

OAVS TGT Science Mock Test - 3 - Question 29
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Arabari project was started in 1972 in
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 29
Arabari Project - Detailed Solution
Introduction:
The Arabari project, initiated in 1972, is an important conservation project in India. It focuses on the sustainable management of forests and wildlife.
Location:
The Arabari project is located in the state of West Bengal, India.
Objective:
The project aims to protect and restore the forest ecosystem, promote sustainable forestry practices, and conserve wildlife species in the Arabari forest region.
Key Features:
1. Afforestation: The project involves extensive afforestation efforts to increase the forest cover in the Arabari region.
2. Wildlife Conservation: It focuses on the conservation of various wildlife species, including endangered and threatened species.
3. Community Involvement: The project encourages active participation and involvement of local communities in forest management and conservation activities.
4. Sustainable Forest Management: It promotes sustainable practices such as selective logging, controlled grazing, and prevention of forest fires.
5. Research and Monitoring: The project conducts research and monitoring activities to assess the impact of conservation efforts and develop effective strategies.
6. Awareness and Education: It conducts awareness programs and educational campaigns to promote environmental conservation among local communities and stakeholders.
Impact:
1. Increase in Forest Cover: The Arabari project has successfully increased the forest cover in the region, leading to improved habitat for wildlife.
2. Wildlife Protection: The conservation efforts have resulted in the protection of various wildlife species, including the Bengal tiger, Indian elephant, and several bird species.
3. Livelihood Support: The involvement of local communities in conservation activities has created opportunities for sustainable livelihoods through eco-tourism and forest-based industries.
4. Carbon Sequestration: The project contributes to mitigating climate change by sequestering carbon dioxide through increased forest cover.
Conclusion:
The Arabari project, initiated in 1972 in West Bengal, has been instrumental in conserving forests, protecting wildlife, and promoting sustainable forest management practices. Its success lies in the active involvement of local communities and the implementation of various conservation strategies.
OAVS TGT Science Mock Test - 3 - Question 30
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What can be inferred about the pH of a salt resulting from a strong acid and a weak base?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 30
In the case of a strong acid and a weak base combining to form a salt, the resulting compound will be acidic with a pH less than 7. The dominance of the strong acid component in the salt contributes to its acidic nature, leading to a pH below the neutral value of 7.
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