Chemical Engineering - Chemical Process

46. 

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

A. has larger production capacity per unit cell.
B. consumes less power per ton of Cl2 produced.
C. produces high purity (70%) caustic soda directly.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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47. 

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.

A. Phosphates
B. Chromates
C. Sulphates
D. Bi-carbonates

Answer: Option B

Explanation:

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48. 

L.D. converter is used in the production of

A. pig iron
B. steel
C. copper
D. zinc

Answer: Option B

Explanation:

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49. 

The terminology 'BTX' used in coal tar distillation industry refers to

A. benzol-toluol-xylol.
B. benzol-toluene-xylene.
C. benzene-toluol-xylol.
D. benzene-toluene-xylene.

Answer: Option D

Explanation:

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50. 

Which of the following is not responsible for causing permanent hardness of water ?

A. Ca(HCO3)2
B. CaCl2
C. MgCl2
D. none of these

Answer: Option A

Explanation:

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