Q. No.Identify the incorrectly matched pair:
1.
Ozone depletion
DNA damage
2.
Greenhouse effect
Increased atmospheric carbon dioxide
3.
Acid rain
pH < 5
4.
Eutrophication
Decreased primary productivity
1.
Ozone depletion
DNA damage
2.
Greenhouse effect
Increased atmospheric carbon dioxide
3.
Acid rain
pH < 5
4.
Eutrophication
Decreased primary productivity
The radiatively active gas with the maximum percent increase in the atmosphere since 1750 AD is:
| 1. | Carbon dioxide | 2. | Methane |
| 3. | Nitrous oxide | 4. | Chlorofluorocarbons |
Non-biodegradable pollutants are created by:
1. Nature
2. Excessive use of resources
3. Humans
4. Natural disasters
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The material generally used for soundproofing rooms like a recording studio or an auditorium is:
| 1. | Cotton | 2. | Coir |
| 3. | Wood | 4. | Styrofoam |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The expanded form of DDT is:
1. Dichloro diphenyl trichloroethane
2. Dichloro diethyl trichloroethane
3. Dichloro dipyridyl trichloroethane
4. Dichloro diphenyl tetrachloroacetate
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Which of the following material takes the longest time for biodegradation?
| 1. | Cotton | 2. | Paper |
| 3. | Bone | 4. | Jute |
Among the following, which one causes the maximum indoor chemical pollution?
1. Burning coal
2. Burning cooking gas
3. Burning mosquito coil
4. Room spray
The green scum seen in the freshwater bodies is:
1. Blue-green algae
2. Red algae
3. Green algae
4. Both 1 and 3
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