Chemical Engineering - Chemical Process

1. 

The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.

A. 800
B. 1600
C. 4000
D. 8500

Answer: Option B

Explanation:

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2. 

Which of the following is not present in bagasse fibre ?

A. Cellulose
B. Lignin
C. Pentogens
D. None of these

Answer: Option D

Explanation:

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3. 

Nitric acid is not used in the manufacture of

A. detergents
B. fertilisers
C. aqua regia
D. explosives.

Answer: Option A

Explanation:

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4. 

Naphthols are derivates of

A. methyl amine
B. naphthalene
C. phenol
D. xylene

Answer: Option B

Explanation:

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5. 

Fermentation is adversely affected by the

A. presence of air.
B. absence of air.
C. high concentration.
D. presence of ammonium salts.

Answer: Option C

Explanation:

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