Chemical Engineering - Chemical Process

11. 

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

A. brighten the faint images.
B. remove metallic silver.
C. convert silver chloride to silver.
D. remove unexposed silver halide.

Answer: Option D

Explanation:

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12. 

High temperature carbonisation of coal takes place at __________ °C.

A. 2000
B. 700
C. 1100
D. < 500

Answer: Option C

Explanation:

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13. 

White phosphorous is stored under water, because

A. it does not react with water.
B. it is poisonous.
C. its kindling temperature in dry air is very low.
D. it is unstable.

Answer: Option C

Explanation:

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14. 

__________ is not a constituent of gun powder.

A. Carbon
B. Charcoal
C. Sulphur
D. Potassium nitrate

Answer: Option A

Explanation:

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15. 

Hydrophilic group of a soap or detergent solution is

A. water hating
B. soil loving
C. water loving
D. none of these

Answer: Option C

Explanation:

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