Chemical Engineering

Question: Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
[A].

-83

[B].

-183

[C].

-196

[D].

-218

Answer: Option B

Explanation:

No answer description available for this question.

Question: Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by
[A].

iron-steam reaction.

[B].

electrolysis of water.

[C].

steam reforming of naphtha.

[D].

its cryogenic separation from coke oven gas.

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ of rubber decreases after its vulcanisation.
[A].

Resistance to the action of organic solvent

[B].

Tackiness

[C].

Maximum service temperature

[D].

Tensile strength

Answer: Option B

Explanation:

No answer description available for this question.

Question: Gun powder, which is an explosive comprises of charcoal, sulphur and
[A].

glycerene

[B].

salt petre

[C].

nitro glycerene

[D].

dynamite

Answer: Option B

Explanation:

No answer description available for this question.

Question: Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
[A].

CaO

[B].

MnO2

[C].

ZnO

[D].

FeS

Answer: Option C

Explanation:

No answer description available for this question.

Question: Nickel is not used as a catalyst in the __________ reaction.
[A].

shift conversion

[B].

oil hydrogenation

[C].

steaming reforming of naphtha

[D].

ammonia cracking/dissociation

Answer: Option A

Explanation:

No answer description available for this question.

Question: At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
[A].

independent of

[B].

directly proportional to

[C].

inversely proportional to

[D].

proportional to the square of

Answer: Option A

Explanation:

No answer description available for this question.

Question: Hydrodenation of vegetable oils is a/an __________ reaction.
[A].

endothermic

[B].

autocatalytic

[C].

exothermic

[D].

homogenous

Answer: Option C

Explanation:

No answer description available for this question.

Question: Percentage of glycerene present in the spent lye obtained during soap manufacture is about
[A].

0.5

[B].

5

[C].

20

[D].

35

Answer: Option B

Explanation:

No answer description available for this question.

Question: Hydrocynic acid (HCN) is used as an insecticide for
[A].

controlling timber degradation by ants

[B].

controlling poultry lice

[C].

potato beetle

[D].

citrus fruits

Answer: Option D

Explanation:

No answer description available for this question.