Chemical Process MCQ Question with Answer

Chemical Process MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 15
Calgon used in water treatment is chemically

Sodium phosphate
Sodium hexametaphosphate
Calcium phosphate
Tricresyl phosphate

Question No : 16
Use of chlorine in the treatment of sewage

Helps in grease separation
Increases the biological oxygen demand (BOD)
Causes bulking of activated sludge
Aids in flocculation

Question No : 17
Wet chlorine gas produced during electrolysis of brine is dehydrated by

Spraying 66° Be H2SO4 counter current to the flow of the gas
Passing it through a bed of diatomaceous earth
Passing it through a bed of silica gel
None of these

Question No : 18
Portland cement consists mainly of

CaO & SiO2
SiO2 & Al2O3
CaO & Al2O3
CaO & Fe2O3

Question No : 19
Mannheim furnace is used in the manufacture of

Hydrochloric acid
H2SO4 by Chamber process
Calcium carbide

Question No : 20
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.

1 - 2
15 - 20
50 - 60
80 - 85

Question No : 21
Plasticisers are added to paints to

Make it corrosion resistant
Make glossy surface
Give elasticity & prevent cracking of the film
Increase atmospheric oxidation