Chemical Engineering - Chemical Process

21. 

Anion exchanger is regenerated usually with

A. NaOH
B. H2SO4
C. hydrazine
D. alum solution

Answer: Option A

Explanation:

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22. 

__________ is the major constituent of the Portland cement.

A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate

Answer: Option C

Explanation:

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23. 

Catalytic oxidation of naphthalene produces

A. styrene
B. phenol
C. phthalic anhydride
D. none of these

Answer: Option C

Explanation:

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24. 

Parathion and Malathion are

A. pesticides.
B. plasticisers for unsaturated polysters.
C. pain-relieving drugs (analgesic).
D. tranquilisers.

Answer: Option A

Explanation:

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25. 

Transparent soaps (e.g. Pears) are

A. usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency.
B. metallic soaps with frothing agent and free stearic acid to achieve transparency.
C. metallic soaps with frothing agent from which glycerine has not been recovered.
D. none of these.

Answer: Option A

Explanation:

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