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

August 11, 2022 by admin

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.

Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by

August 11, 2022 by admin

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.

__________ of rubber decreases after its vulcanisation.

August 11, 2022 by admin

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.

The author is not happy with word ‘law’ because

August 11, 2022 by admin

Question: The author is not happy with word ‘law’ because
[A].

it connotes rigidity and harshness

[B].

it implies an agency which has made them

[C].

it does not convey the sense of nature’s uniformity

[D].

it gives rise to false beliefs

Answer: Option A

Explanation:

No answer description available for this question.

Gun powder, which is an explosive comprises of charcoal, sulphur and

August 11, 2022 by admin

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.

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

August 11, 2022 by admin

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.

Nickel is not used as a catalyst in the __________ reaction.

August 11, 2022 by admin

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.

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

August 11, 2022 by admin

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.

Hydrodenation of vegetable oils is a/an __________ reaction.

August 11, 2022 by admin

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.

Percentage of glycerene present in the spent lye obtained during soap manufacture is about

August 11, 2022 by admin

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

0.5

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.