The best measure(s) to control water pollution is/are:

1.	Compost should be preferred over chemical fertilizers.
2.	The concentration of pollutants in the industrial plants should be checked regularly.
3.	All industrial and chemical discharges should be made free from toxic metals before allowing them to enter a water body.
4.	All of the above.

Match List-1 with List-II

List-I	List-II
(a). $2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$	(i). Acid rain
(b).  $$	(ii). Smog
(c). ${\mathrm{CaCO}}_3+{\mathrm{H}}_2{\mathrm{SO}}_4\to$ ${\mathrm{CaSO}}_4+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$	(iii). Ozone depletion
(d). ${\mathrm{NO}}_2\left(\mathrm{g}\right)\stackrel{\mathrm{hv}}{\to }\mathrm{NO}\left(\mathrm{g}\right)+\mathrm{O}\left(\mathrm{g}\right)$	(iv). Tropospheric pollution

Choose the correct answer from the options given below:

The correct statement(s) regarding green chemistry is/are:

The example(s) of pesticide is/are-

1. Aldrin

2. Sodium chlorate

3. Dieldrin

4. Both (1) and (3)

The major source(s) of soil pollution is/are:

1. Industrial waste.

2. Fertilizers and pesticides.

3. Organic compost.

4. Both (1) are (2)

Biochemical Oxygen Demand (BOD) is-

The major pollutant(s) of water pollution is/are:

1. Pathogens.

2. Organic waste.

3. Chemical components.

4. All of the above.

Consequence(s) of ozone hole is/are:

The reaction(s) involved in ozone layer depletion in the stratosphere is/are:

1.
2.
3.
4.	All of the above

Photochemical smog can be controlled by:

1. The use of catalytic converters in automobiles.

2. Plantation of plants such as Pinus, Juniparur, etc.

3. Both (1) and (2)

4. None of the above