Given below are two statements:
Assertion (A): | The pH of acid rain is less than 5.6. |
Reason (R): | Carbon dioxide present in the atmosphere dissolves in rainwater and forms carbonic acid. |
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): | Greenhouse effect was observed in houses used to grow plants and these are made of green glass. |
Reason (R): | Greenhouse name has been given because glasshouses are made of green glass. |
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 |
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 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 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 |
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. |
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): | 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. |
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. |