Chemical Process

Question: A substance produced by a living organism and capable of anti-microbial activity is called a/an
[A].

antibiotic

[B].

antiseptic

[C].

disinfectant

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Ethyl alcohol cannot be produced
[A].

from waste sulphite substrate of paper mills.

[B].

by esterification and hydroloysis of ethylene.

[C].

from molasses.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Air used in aerobic fermentation must be sterilized, otherwise the
[A].

recovery of product will be difficult.

[B].

contamination of pure culture would result.

[C].

uniformity of product cannot be achieved.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Massecuite is
[A].

used for paper making.

[B].

used as a cattle feed.

[C].

highly acidic in nature.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
[A].

70

[B].

55

[C].

80

[D].

94

Answer: Option D

Explanation:

No answer description available for this question.

Question: The amount of benzene present in pure benzol is about __________ percent.
[A].

30

[B].

50

[C].

70

[D].

90

Answer: Option C

Explanation:

No answer description available for this question.

Question: Black liquor is converted into white liquor by
[A].

evaporation and burning the concentrate followed by causticisation of products.

[B].

multi-effect evaporation only.

[C].

selective liquid extraction.

[D].

extractive distillation.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
[A].

10

[B].

50

[C].

80

[D].

95

Answer: Option B

Explanation:

No answer description available for this question.

Question: In sulphate pulp manufacture, the pressure and temperature in the digestor is
[A].

10 atm., 800 °C

[B].

10 atm., 170-180°C

[C].

1 atm., 170 – 180°C

[D].

l atm., 800°C

Answer: Option B

Explanation:

No answer description available for this question.

Question: Digestion of wood-base materials (for manufacture of pulp) is done to
[A].

remove lignin.

[B].

produce long fibres.

[C].

prevent deterioration on storage.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.