Chemical Engineering Environmental Engineering MCQ Questions Pdf - 2

Question: 6

Which of the following is the coldest region of atmosphere?

(A) mesosphere

(B) stratosphere

(C) troposphere

(D) thermosphere

Ans: A

mesosphere

Question: 7

Which of the following is the most lethal water pollutant?

(A) suspended solids

(B) alkalis

(C) phenol and cyanide

(D) chlorine

Ans: C

phenol and cyanide

Question: 8

Which is the secondary air pollutant?

(A) dust particles

(B) nitrogen dioxide

(C) sulphur dioxide

(D) photochemical smog

Ans: D

photochemical smog

Question: 9

Aerosol is

(A) carbon particles of microscopic size

(B) dispersion of small solid/liquid particles in gaseous media

(C) diffused liquid particles

(D) finely divided ash particles

Ans: B

dispersion of small solid/liquid particles in gaseous media

Question: 10

The main industrial source of emission of hydrogen sulphide air pollutant is

(A) metallurgical roasting and smelting plant

(B) pulp and paper plant

(C) coal based thermal power plants

(D) petroleum refineries

Ans: C

coal based thermal power plants

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