Chemical Engineering - Chemical Process

6. 

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

A. (NH4)2SO4
B. NH4Cl
C. (NH4)2 NO3
D. liquid NH3

Answer: Option A

Explanation:

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7. 

Flexible foam (for mattresses) is usually made of

A. PVC
B. silicone
C. polyurethanes
D. polyamides

Answer: Option C

Explanation:

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8. 

Glycerine is a by-product of the __________ industry.

A. soap
B. detergent
C. oil hydrogenation
D. paint

Answer: Option A

Explanation:

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9. 

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

A. adjust the pH of the syrup.
B. remove the coloring matter from the syrup.
C. reduce the viscosity of the syrup.
D. improve the rate of crystallisation of sugar.

Answer: Option A

Explanation:

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10. 

Permanent hardness of water can be removed by

A. addition of soda ash to it.
B. treating it with zeolites.
C. passing it through sodium hexametaphosphate.
D. all (a), (b), and (c).

Answer: Option D

Explanation:

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