Chemical Engineering - Chemical Process

31. 

Sulphur addition in soap is done to

A. improve the soap texture.
B. cure pimples & dandruff.
C. fasten lather formation.
D. increase its cleansing action.

Answer: Option B

Explanation:

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32. 

Phosphate rock is a raw material for the manufacture of

A. phosphoric acid
B. phosphorous
C. superphosphates
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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33. 

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A. poor oxidation stability and high gum forming tendency.
B. greater tendency of decomposition at elevated temperature.
C. hydrolysis tendency in presence of water.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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34. 

Which of the following is not a raw material used for the manufacture of ordinary glass?

A. Iron oxide
B. Soda ash
C. Limestone
D. Silica

Answer: Option A

Explanation:

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35. 

Esterification reaction

A. produces soap.
B. is reversible.
C. is a reaction between an alcohol and an organic acid.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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