Domestic waste will lead to :
1. Biodegradable pollution
2. Nondegradable pollution
3. Thermal pollution of soil
4. Air pollution
... is not a greenhouse gas :-
1. Hydrogen
2. Carbon dioxide
3. Methane
4. Nitrous oxide or
The gas that damages the ozone layer is -
1. CFCs
2. CO2
3. CH4
4. SO2
The phenomenon in which atmospheric gases trap the heat radiations from the sun near the earth’s surface and keeps it warm is known as-
1. Natural greenhouse effect
2. Tyndall effect
3. Heating effect
4. Joule’s effect
Acid rain occurs due to the presence of :
1. in the atmosphere
2. in the atmosphere
3. in the atmosphere
4. in the atmosphere
Ozone depletion occurs in :
1. Tropospheric pollution.
2. Stratospheric pollution.
3. Air pollution.
4. Photochemical smog.
Major component of acid rain is :
1.
2.
3. HCl
4.
The incorrect statement about carbon monoxide is-
1. | It reduces the oxygen-carrying ability of blood. |
2. | The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin. |
3. | It is produced due to incomplete combustion. |
4. | It forms carboxyhaemoglobin. |
‘White lung cancer’ is caused by :
1. Asbestos
2. Silica
3. Textiles
4. Paper
Incorrect statement among the following is:
1. Oxides of sulphur, nitrogen, and carbon are the most widespread air pollutant.
2. pH of drinking water should be between 6.5 and 8.5.
3. Concentration of dissolved oxygen below 6 ppm is good for the growth of fish.
4. Clean water would have a BOD value of less than 5 ppm.