Chemical Process

Question: Low purity oxygen is used for
[A].

L.D. steel making.

[B].

cutting and welding of metals.

[C].

medicinal purposes.

[D].

chemical oxidation processes.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Good quality of edible salt is obtained from brine by the process of
[A].

solar evaporation

[B].

vacuum evaporation

[C].

freeze drying

[D].

electrolysis

Answer: Option B

Explanation:

No answer description available for this question.

Question: Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and
[A].

sulphuric acid

[B].

phosphoric acid

[C].

hydrochloric acid

[D].

hydroflouric acid

Answer: Option A

Explanation:

No answer description available for this question.

Question: Electric bulbs are made of __________ glass.
[A].

jena

[B].

flint

[C].

crookes

[D].

pyrex

Answer: Option B

Explanation:

No answer description available for this question.

Question: Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
[A].

chromium

[B].

arsenic

[C].

copper

[D].

mangnese

Answer: Option C

Explanation:

No answer description available for this question.

Question: Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
[A].

lead

[B].

borosilicate

[C].

soda lime

[D].

alkali silicate

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
[A].

Pyrex

[B].

Soda lime

[C].

Lead

[D].

High silica

Answer: Option A

Explanation:

No answer description available for this question.

Question: Ordinary glass is not a/an
[A].

amorphous isotropic material.

[B].

supercooled liquid.

[C].

material with sharp definite melting point.

[D].

electrical insulator.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
[A].

75

[B].

< 10

[C].

> 30

[D].

50

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ paper is used in the manufacture of newsprint paper.
[A].

Groundwood

[B].

Board

[C].

Tissue

[D].

Wrapping

Answer: Option A

Explanation:

No answer description available for this question.