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)
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. |
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 |