Chemical Engineering - Chemical Process

11. 

Free alkali in a toilet soap is __________ that in a laundary shop.

A. less than
B. more than
C. same
D. none of these

Answer: Option A

Explanation:

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12. 

Dehydrogenation of isopropanol produces

A. propyl alcohol
B. acetone
C. trichloroethylene
D. formaldehyde

Answer: Option B

Explanation:

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13. 

Pick out the wrong statement.

A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
B. Soap powder is prepared by mixing soap with hydrated sodium carbonate.
C. Detergents differ from soaps in their action in hard water.
D. Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.

Answer: Option D

Explanation:

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14. 

Concentration of hydrogen peroxide is done by

A. crystallisation
B. vacuum crystallisation
C. atmospheric distillation
D. dehydration

Answer: Option B

Explanation:

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15. 

Helium is produced on commercial scale from

A. air
B. natural gas
C. coke oven gas
D. none of these

Answer: Option B

Explanation:

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