Practice Test: Question Set - 39
1. The purpose of adding Na2CO3 to water of low alkalinity is to
- (A) Permit the use of
alum as a coagulant
- (B) Increase the
softening capacity of zeolite
- (C) Facilitate easy
regeneration of zeolite
- (D) All (a), (b) and (c)
2. Margarine is a/an
- (A) Fat
- (B) Explosive
- (C) Plasticizer
- (D) Rocket
propellant
3. Main constituents of Portland cement are calcium aluminate and
- (A) Gypsum
- (B) Silicates
- (C) Sodium
silicate
- (D) Carbonates
4. Cumene is the starting material for the production of
- (A) Benzoic acid
- (B) Phenol and acetone
- (C) Isoprene
- (D) Styrene
5. Glauber's salt is chemically represented by
- (A) Na2SO4.10H2O
- (B) CaCl(OCl)
- (C) CaSO4.H2O
- (D) (NH4)2SO4
6. Liquefaction of gases cannot be done by
- (A) Exchange
of heat with colder stream
- (B) Adiabatic expansion
through a throttle valve (Joule-Thomson expansion)
- (C) Merely compressing it
beyond critical pressure
- (D) Adiabatic
expansion against a piston or in a turbine
7. Which of the following is used as a binding material in soap to improve soap texture?
- (A) Rosin
- (B) Borax
- (C) Benzyl acetate
- (D) Sodium carbonate
8. Alcohol percentage in molasses may be around
- (A) 10
- (B) 40
- (C) 70
- (D) 85
9. Heating of __________ to 120°C, produces plaster of paris.
- (A) Blue vitriol
- (B) Gypsum
- (C) Calcium silicate
- (D) Calcium sulphate
10. Adipic acid is an intermediate in the manufacture of
- (A) Perspex
- (B) Nylon-66
- (C) Polystyrene
- (D) Bakelite
11. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
- (A) It is very corrosive
at elevated temperature
- (B) Its viscosity is not
reduced on further heating (hence pressure drop on pumping it, cannot be
further reduced)
- (C) It decomposes on
further increasing the temperature
- (D) None of these
12. Average sulphur content in Indian pyrites is about __________ percent.
- (A) 15
- (B) 35
- (C) 55
- (D) 70
13. In industrial nomenclature, alcohol means
- (A) Butyl
alcohol
- (B) Propyl alcohol
- (C) Ethanol
- (D) Methyl alcohol
14. The process used for the manufacture of ethyl alcohol from molasses is
- (A) Distillation
- (B) Dehydration
- (C) Dehydrogenation
- (D) None of these
15. Gun powder uses
- (A) Sulphur
- (B) Charcoal
- (C) Potassium nitrate
- (D) All (a), (b), &
(c)
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