Chemical Process

Question: Flexible foam (for mattresses) is usually made of
[A].

PVC

[B].

silicone

[C].

polyurethanes

[D].

polyamides

Answer: Option C

Explanation:

No answer description available for this question.

Question: The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
[A].

dilute H2SO4

[B].

oleum

[C].

ultraviolet light

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: DDT should not be allowed to come in contact with iron (during its manufacture) to
[A].

avoid its decomposition.

[B].

prevent sulphonation of the monochlorobenzene by the acid catalyst.

[C].

achieve non-hygroscopic property.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Lindane is
[A].

not a fumigant.

[B].

BHC (Benzene Hexa Chloride) containing 99% γ-isomer.

[C].

a by-product of BHC manufacture.

[D].

both(b) and (c).

Answer: Option B

Explanation:

No answer description available for this question.

Question: Chloral is used in the manufacture of
[A].

DDT

[B].

BHC

[C].

parathion

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Penicillin is separated from fermented broth by
[A].

extraction with amyl or butyl acetate.

[B].

ternery azeotropic distillation.

[C].

evaporation in calendria.

[D].

extractive distillation.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fermentator temperature during production of alcohol from molasses is around __________ °C.
[A].

5

[B].

30

[C].

150

[D].

300

Answer: Option B

Explanation:

No answer description available for this question.

Question: Alcohol percentage in molasses may be around
[A].

10

[B].

40

[C].

70

[D].

85

Answer: Option B

Explanation:

No answer description available for this question.

Question: Percentage of alcohol in beer may be around __________ percent.
[A].

2-8

[B].

18-23

[C].

27-32

[D].

1-4

Answer: Option A

Explanation:

No answer description available for this question.

Question: A bio-catalyst produced by living cells which acts independent of the cell is called a/an
[A].

substrate

[B].

enzyme

[C].

nutrient

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.