Chemical Engineering - Chemical Process

36. 

__________ are added in lacquers to remove film brittleness and to improve adhereness.

A. Film forming materials
B. Plasticisers
C. Diluents
D. Solvents

Answer: Option B

Explanation:

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37. 

Washing of coal is done to

A. remove the inherent impurities.
B. remove the adhering impurities.
C. reduce the ash content.
D. both(b) and (c).

Answer: Option D

Explanation:

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38. 

Systemic insecticides

A. are absorbed throughout the plant.
B. kill insects following external bodily contact.
C. are stomach poisons.
D. emit poisonous vapour.

Answer: Option A

Explanation:

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39. 

Dry ice (solidified CO2) is used for the

A. storage & shipment of frozen foods and ice-creams.
B. liquefaction of permanent gases.
C. liquefaction of natural gas.
D. none of these.

Answer: Option A

Explanation:

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40. 

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

A. diamine and the ring.
B. dibasic acid and the ring.
C. diamine and the dibasic acid.
D. none of these.

Answer: Option C

Explanation:

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