Environmental Chemistry Set 5

Chlorofluorocarbons are responsible for ozone layer depletion. ✘ Acid rains is mostly because of oxides of nitrogen and sulphur ✘ Green house effect is responsible for global warming ✘ Ozone layer does not permit infrared radiation from the sun to each the earth ✔ NULL ✔ NULL NULL

CO ✘ ✘ ✘ ✔ NULL ✔ NULL NULL

Removal of top soil ✘ Release of toxic/undesirable materials in environment ✘ Conservation of energy ✘ All of the above ✔ NULL ✔ NULL NULL

✘ ✘ ✘ ✔ NULL ✔ NULL NULL

Carbon dioxide ✘ Nitrogen ✘ Oxygen ✘ Ozone ✔ NULL ✔ NULL NULL

Stratosphere ✘ Troposphere ✘ Mesosphere ✘ Thermosphere ✔ NULL ✔ NULL NULL

Artificial rain ✘ Acid rain ✘ Hails ✘ None of these ✔ NULL ✔ NULL NULL

Oxides of halogens ✘ Oxides of sulphur ✘ Oxides of carbon ✘ Oxides of nitrogen ✔ NULL ✔ NULL NULL

Photochemistry ✘ Sonochemistry ✘ Nuclear chemistry ✘ Biochemistry ✔ NULL ✔ NULL NULL

Gravity settling chamber removes larger particles from the air. ✘ Cyclone collector removes fine particles in the diameter range 5-20 microns. ✘ Wet scrubbers are used to wash away all types of particulates. ✘ In electrostatic precipitator, the particulates are made to acquire positive charge which are then attracted by the negative electrode and removed. ✔ NULL ✔ NULL NULL