Green chemistry means such reactions that:
1. | Produce colour during reactions |
2. | Reduce the use and production of hazardous chemicals. |
3. | Are related to the depletion of the ozone layer. |
4. | Study the reactions in plants. |
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
The gas that damages the ozone layer is -
1. CFCs
2. CO2
3. CH4
4. SO2
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
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