Chemical Engineering - Chemical Process

31. 

In the production of soda ash by Solvay process, the by-product is

A. CaCl2
B. NH4Cl
C. NH3
D. NaOH

Answer: Option A

Explanation:

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32. 

The ideal pulp for the manufacture of paper should have high __________ content.

A. cellulose
B. lignin
C. both (a) & (b)
D. none of these

Answer: Option A

Explanation:

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33. 

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

A. independent of
B. directly proportional to
C. inversely proportional to
D. proportional to the square of

Answer: Option A

Explanation:

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34. 

Which of the following is a constituent of vinegar ?

A. Around 10% alcohol
B. Around 1% acetic acid
C. Both (a) and (b)
D. Neither (a) nor (b)

Answer: Option C

Explanation:

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35. 

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

A. it is very corrosive at elevated temperature.
B. its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).
C. it decomposes on further increasing the temperature.
D. none of these.

Answer: Option B

Explanation:

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