set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following chemicals is used in foam fire extinguishers? [NDA]

a) Cobalt sulphate

b) Copper sulphate

c) Aluminium sulphate

d) Nickel sulphate

Question : 2

Which one of the following is another name of RDX?

a) Cyclohexane

b) Dextran

c) Cyanohydrin

d) Cyclonite

Question : 3

DDT is a –

a) antibiotics

b) biodegradable pollutant

c) non-biodegradable pollutant

d) none of the above

Question : 4

Minimata disease is a pollution-related disease, which results from –

a) accumulation of arsenic into atmosphere

b) release of industrial waste mercury into fishing water

c) release of human organic waste into drinking water

d) oil spills into sea

Question : 5

Eutrophication causes reduction in

a) nutrients

b) dissolved salts

c) dissolved oxygen

d) All of these

Question : 6

Statement I :
Phenyl is used as a household germicide.
Statement II :
Phenyl is phenol derivative and phenol is an effective germicide.

a) Statement I is true but Statement II is false

b) Both Statement I and Statement II are true but Statement II is NOT the correct explanation of Statement I

c) Both Statement I and Statement II are true and Statement II is the correct explanation of Statement I

d) Statement I is false but Statement II is true