Chemical Process Glue Engineering Questions and Answers - Set 32 - ObjectiveBooks

Chemical Process Glue Engineering Questions and Answers - Set 32

Practice Test: Question Set - 32

1. Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
    (A) Emulsification
    (B) Dispersion
    (C) Precipitation
    (D) Wetting

2. Thorium is mainly used
    (A) For the manufacture of gas mantles
    (B) As a fissile fuel in a nuclear reactor
    (C) In the manufacture of hydrogen bomb
    (D) In the treatment of cancer

3. Pick out the wrong statement pertaining to nitric acid.
    (A) About 90% of nitric acid is manufactured by Ostwald's process
    (B) It is a strong mono basic acid which reacts with almost all the metals except noble metals
    (C) Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)
    (D) Arc process of nitric acid manufacture is economical as compared to Ostwald's process

4. Which oil is preferred for paint manufacture?
    (A) Drying oil
    (B) Non-drying oil
    (C) Semi-drying oil
    (D) Saturated oil

5. Tall oil obtained as a by-product from the black liquor recovery is
    (A) A black, sticky & viscous liquid
    (B) Used in the manufacture of greases, emulsions & soaps
    (C) Composed mainly of rosin & fatty acids
    (D) All (a), (b) & (c)

6. Which of the following, when pyrolysed, produces Perchloroethylene?
    (A) Ethylene dichloride
    (B) Chlorobenzene
    (C) Carbon tetrachloride
    (D) Chlorinated paraffin

7. Magnesium and calcium __________ cause temporary hardness of water.
    (A) Carbonates
    (B) Bicarbonates
    (C) Phosphates
    (D) Sulphates

8. Pick out the exothermic reaction out of the following:
    (A) C + H2O = CO + H2
    (B) CaC2 + H2O = Ca(OH)2 + C2H2
    (C) MgCO3 = MgO + CO2
    (D) All (a), (b) and (c)

9. Terylene is
    (A) Same as Dacron
    (B) A polyester
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

10. __________ paper is used in the manufacture of newsprint paper.
    (A) Ground-wood
    (B) Board
    (C) Tissue
    (D) Wrapping

11. Bakelite is chemically known as
    (A) Polyvinyl chloride (PVC)
    (B) Polybutadiene
    (C) Phenol formaldehyde
    (D) Polyurethane

12. Which of the following is the main constituent of the mother liquor produced in salt industry?
    (A) Quick lime
    (B) Glauber's salt
    (C) Salt petre
    (D) Bromine

13. Unsaturated oils compared to saturated oils have
    (A) Lower melting point & higher reactivity to oxygen
    (B) Higher melting point & higher reactivity to oxygen
    (C) Lower melting point & lower reactivity to oxygen
    (D) Higher melting point & lower reactivity to oxygen

14. Concentration of hydrogen peroxide is done by
    (A) Crystallization
    (B) Vacuum crystallization
    (C) Atmospheric distillation
    (D) Dehydration

15. Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
    (A) 1
    (B) 2.5
    (C) 5
    (D) 10

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