Chemical Engineering - Chemical Process

1. 

The noble gas which occurs most abundantly in the atmosphere is

A. helium
B. neon
C. krypton
D. argon

Answer: Option D

Explanation:

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2. 

Production of alcohol by fermentation of molasses is an __________ process.

A. anaerobic
B. aerobic
C. endothermic
D. both(b) and (c)

Answer: Option B

Explanation:

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3. 

Main constituents of portland cement are calcium aluminate and

A. gypsum
B. silicates
C. sodium silicate
D. carbonates

Answer: Option B

Explanation:

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4. 

Pick out the wrong statement.

A. High early strength cement are made from materials having high silica to lime ratio.
B. The function of gypsum in cement is to enhance its initial setting rate.
C. Acid resistant cements are known as silicate cement.
D. Major component of greyish portland cement is tricalcium silicate.

Answer: Option A

Explanation:

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5. 

Common salt is generally not produced commonly by __________ method from brine.

A. freeze drying
B. electrolytic
C. solar evaporation
D. vacuum evaporation

Answer: Option A

Explanation:

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