Photochemical smog does not contain:
1. Ozone
2. NOx
3. PAN
4. Carbon monoxide

Which of the following is not an ill effect of PAN?
1. inhibition of electron transport system in plants
2. damage to chloroplasts in plants
3. acute irritation of eyes in humans
4. leukemia in humans

The pH of normal rainwater is:

The most effective device to remove particulate matter from polluted air is:
1. electrostatic precipitator

2. cyclonic separator

3. trajectory separator

4. scrubber

The device, normally used to remove gaseous pollutants from polluted air but can remove large particulate matter as well, is:
1. electrostatic precipitator

2. cyclonic separator

3. trajectory separator

4. Scrubber

Catalytic Converters:

1. only I & II are correct
2. only I & III are correct
3. Only II & III are correct
4. I, II & III are correct

A water body has low DO content. An organism that is likely to flourish here will be:
1. Gonyaulax, an annelid
2. Gonyaulax, a nematode
3. Tubifex, an annelid
4. Tubifex, a nematode

In an algal bloom, the cause of death of other algae is usually:
1. toxins

2. decreased DO

3. decreased sunlight

4. decreased nutrients

Identify the incorrectly matched pair with respect to contamination of water:
1. Minamata disease: Mercury
2. Blue bay syndrome: excessive nitrates
3. Black foot disease: excessive arsenic
4. Dental caries: excessive fluoride

A painful bone condition is produced when the drinking water is contaminated with:
1. Lead
2. Mercury
3. Cadmium
4. Arsenic