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

Green chemistry means such reactions that:

Which one of the following statements regarding photochemical smog is not correct?

1. Carbon monoxide does not play any role in photochemical smog formation

2. Photochemical smog is an oxidising agent in character

3. Photochemical smog is formed through photochemical reaction involving energy

4. Photochemical smog does not cause irritation in eyes and throat

Carbon monoxide is a pollutant because it:

1. reacts with oxygen

2. inhibits glycolysis

3. reacts with haemoglobin

4. makes nervous system inactive

The wrong statement about photochemical smog is-

1. Photochemical smog causes irritation in eyes.

2. It has a low concentration of oxidizing agents

3. It can be controlled by controlling the release of ${\mathrm{NO}}_2$, hydrocarbon, ozone, etc.

4. Plantation of some plants helps in controlling photochemical smog.

Which one of the following statements is not true?

A gas that is not common component of photochemical smog is-

1. Ozone

2. Acrolein

3. Peroxyacetyl nitrate

4. Chlorofluorocarbons

Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

1. N₂O₅
2. NO₂
3. N₂O
4. NO

Among the following, the one that is not a greenhouse gas is:

1. Sulphur dioxide

2. Nitrous oxide

3. Methane

4. Ozone

Which important greenhouse gas, other than carbon dioxide, is being produced from the agricultural fields?

1. Arsine

2. Sulphur dioxide

3. Ammonia

4. Nitrous oxide