Chemical Engineering - Chemical Process

26. 

Essential oils are usually obtained using

A. steam distillation
B. extractive distillation
C. solvent extraction
D. leaching

Answer: Option D

Explanation:

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27. 

Impurities present in brine is normally removed by treatment with

A. NH3 and CO2.
B. lime and soda ash.
C. lime, ammonia and carbon.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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28. 

Hydrogenation of oil/fat does not

A. improve its resistance to rancid oxidation.
B. raise its melting point.
C. remove double bonds.
D. none of these.

Answer: Option D

Explanation:

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29. 

Solvay process as compared to dual process (i.e. modified Solvay process)

A. can use low grade brine.
B. has less corrosion problems.
C. involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl.
D. both (b) and (c).

Answer: Option D

Explanation:

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30. 

Builders are added in soap to act as

A. cleaning power booster
B. anti-redeposition agent
C. corrosion inhibitor
D. fabric brightener

Answer: Option A

Explanation:

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