environmental chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 6

Ozone layer in upper atmosphere (stratosphere) is destroyed by –

a) chlorofluoro carbon (CFC)

b) photochemical smog

c) hydrochloric acid

d) sulphur dioxide

Question : 7

What is DDT among the following ?

a) A fertilizer

b) Biodegradable pollutant

c) Greenhouse gas

d) Non-biodegradable pollutant

Question : 8

Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.

a) O₃

b) SO₂

c) NO₂

d) Unsaturated hydrocarbon

Question : 9 [CDS]

Which one of the following is associated with the formation of brown air in traffic congested cities?

a) Carbon dioxide

b) Nitrogen oxide

c) Sulphur dioxide

d) Carbon monoxide

Question : 10

Which one of the following statement is not true?

a) Concentration of DO below 6 ppm is good for the growth of fish.

b) Clean water would have a BOD value of less than 5 ppm.

c) pH of drinking water should be between 5.5 – 9.5.

d) Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant.