Chemical Engineering - Chemical Process

41. 

Pick out the wrong statement.

A. Catalytic hydrogenation of carbon monoxide produces methyl alcohol.
B. In nylon-6, the number 6 represents the total number of carbon atoms in the ring.
C. Raw materials for DDT manufacture are benzene and chlorine.
D. Ethanolamines are produced by using ammonia and ethylene oxide as raw material.

Answer: Option C

Explanation:

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42. 

Molecular weights of polymers are in the range of

A. 102 - 102
B. 105 - 109
C. 102 - 107
D. 109 - 1011

Answer: Option C

Explanation:

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43. 

Sulphur removal by heating of pyrite ore in presence of air is called its

A. reduction
B. roasting
C. calcination
D. smelting

Answer: Option B

Explanation:

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44. 

Deacon's method is used for the manufacture of

A. glauber's salt
B. common salt
C. chlorine
D. graphite electrode

Answer: Option C

Explanation:

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45. 

Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely.
B. Activated carbon can be used for taste & odour control without subsequent filtration.
C. Application of activated carbon reduces the temporary hardness of water.
D. Normally, the turbidity is removed by adding a coagulent prior to sedimentation.

Answer: Option D

Explanation:

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