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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