Q. No.The consequences of global warming may be ______.
a. Increase in the average temperature of the earth
b. Melting of Himalayan Glaciers
c. Increased biochemical oxygen demand
d. Eutrophication
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Given below are two statements:
| Assertion (A): | Photochemical smog is oxidizing in nature. |
| Reason (R): | Photochemical smog contains NO2 and O3, which are formed during the sequence of reactions. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Given below are two statements:
| Assertion (A): | Carbon dioxide is one of the important greenhouse gases. |
| Reason (R): | It is largely produced by the respiratory function of animals and plants. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Given below are two statements:
| Assertion (A): | Ozone is destroyed by solar radiation in the upper stratosphere. |
| Reason (R): | Thinning of the ozone layer allows excessive UV radiations to reach the surface of the earth. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
| Assertion (A): | Excessive use of chlorinated synthetic pesticides causes soil and water pollution. |
| Reason (R): | Such pesticides are non-biodegradable. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Given below are two statements:
| Assertion (A): | If the BOD level of water in a reservoir is less than 5 ppm it is highly polluted. |
| Reason (R): | High biological oxygen demand means the low activity of bacteria in water. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
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 |
Match the pollutant (s) in Column I with effect (s) in Column II.
| Column I | Column II |
| A. Oxides of Sulphur | 1. Red haze in traffic and congested areas |
| B. Nitrogen dioxide | 2. Damage to kidney |
| C. Lead | 3. ‘Blue baby’ syndrome |
| D. Nitrate in drinking water | 4. Respiratory diseases |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 2 | 3 |
Match the activity given in Column I with the type of pollution created by it given in Column II.
|
Column I (Activity) |
Column II (Effect) |
|
A. Releasing gases to the atmosphere after burning waste material containing Sulphur |
1. Water pollution |
|
B. Using carbamates as pesticides |
2. Photochemical smog, damage to plant life, corrosion to building material, induce breathing problems, water pollution |
|
C. Using synthetic detergents for washing clothes |
3. Damaging ozone layer |
|
D. Releasing gases produced by automobiles and factories in the atmosphere |
4. May cause nerve disease in human |
|
E. Using chlorofluorocarbon compounds for cleaning computer parts |
5. Classical smog, acid rain, water pollution, induce breathing problems, damage to buildings, corrosion of metals |
Codes
| Options: | A | B | C | D | E |
| 1. | 2 | 3 | 4 | 1 | 5 |
| 2. | 1 | 2 | 3 | 5 | 4 |
| 3. | 5 | 4 | 1 | 2 | 3 |
| 4. | 4 | 5 | 3 | 2 | 1 |
Match the pollutants given in Column I with their effects given in Column II.
|
Column I |
Column II |
|
A. increase in the concentration of phosphorus and nitrogen |
1. BOD level of water increases |
|
B. Methane in air |
2. Acid rain |
|
C. Synthetic detergents in water |
3. Global warming |
|
D. Nitrogen oxides in the air |
4. Eutrophication |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 4 | 3 | 1 | 2 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
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