Ozone is a very toxic gas and a strong oxidizing agent. It is still useful for life on earth :

1. because it traps harmful UV-rays.

2. because it balances global warming.

3. because it traps harmful X-rays.

4. because it  traps harmful γ-rays.

Subtopic:  Air Pollution - Ozone |
 92%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Mercury, aluminum, lead, copper, DDT, etc. are an example of :

1. Biodegradable Pollutant.

2. Non-biodegradable pollutant.

3. Non pollutant.

4. Noise pollutant.

Subtopic:  Water Pollution - Water Pollution & Portable Water |
 86%
From NCERT
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A farmer was told that fishes were not fit for human consumption because a large amount of pesticides had accumulated in the tissues of fishes. This happens:

1. By the transfer of pesticides in the food chain.

2. By the degradation of pesticides.

3. By the reaction of pesticides with atmospheric oxygen.

4. By the reaction of pesticides with atmospheric carbon dioxide.

Subtopic:  Water Pollution - Water Pollution & Portable Water |
 83%
From NCERT
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The best alternative of tetrachloroethane for dry cleaning is-

1. Liquified CO2 along with suitable detergent.

2. Liquified CO2 along with suitable oil.

3. Liquified SO2 along with suitable detergents.

4. Liquified SO2 along with suitable oil.

Subtopic:  Green Chemistry |
 71%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Which, of the following, gases contributes  nearly 50 % to the green house effect (which, in turn, causes global warming) ?

1. SO2

2. SO3

3. CO2

4. Water vapour

Subtopic:  Air Pollution - Global Warming |
 86%
From NCERT
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The chemical that is an excellent ‘green’ solvent as well as a greenhouse gas is: 

1. Methanol

2. CFCs

3. Carbon monoxide

4. Carbon Dioxide

Subtopic:  Green Chemistry |
 66%
From NCERT
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Pollution that occurs in the lowest layer of the atmosphere is :

1. Stratosphere pollution.

2. Ozone layer pollution.

3. Air pollution.

4. Troposphere pollution.

Subtopic:  Air Pollution - Acid Rain |
 78%
From NCERT
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Match the terms given in Column I with the compounds given in Column II.

Column I Column II
A. Acid rain 1. CHCl2-CHF2
B. Photochemical smog 2. CO
C. Combination with hemoglobin 3. Unsaturated hydrocarbons
D. Depletion of the ozone layer 4. SO2

Codes

A B C D
1. 4 2 3 1
2. 1 2 3 4
3. 4 3 2 1
4. 4 1 3 2
Subtopic:  Air Pollution - Acid Rain |
 88%
From NCERT
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Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be : 

1. Highly polluted.

2. Poor in dissolved oxygen.

3. Rich in dissolved oxygen.

4. Not suitable for aquatic life.

Subtopic:  Water Pollution - Biological Oxygen Demand |
 71%
From NCERT
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Living in the atmosphere of CO is dangerous because it : 

1. Combines with Opresent inside to form CO2

2. Reduces organic matter of tissues.

3. Combines with haemoglobin and makes it incapable to absorb oxygen.

4. Dilutes the blood.

Subtopic:  Air Pollution - Smog |
 94%
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