Q. No.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 -rays.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Mercury, aluminum, lead, copper, DDT, etc. are an example of :
1. Biodegradable Pollutant.
2. Non-biodegradable pollutant.
3. Non pollutant.
4. Noise pollutant.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Pollution that occurs in the lowest layer of the atmosphere is :
1. Stratosphere pollution.
2. Ozone layer pollution.
3. Air pollution.
4. Troposphere pollution.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Match the terms given in Column I with the compounds given in Column II.
| Column I | Column II |
| A. Acid rain | 1. |
| B. Photochemical smog | 2. |
| C. Combination with hemoglobin | 3. Unsaturated hydrocarbons |
| D. Depletion of the ozone layer | 4. |
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 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
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.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Living in the atmosphere of CO is dangerous because it :
1. Combines with O2 present 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.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
© 2024 GoodEd Technologies Pvt. Ltd.