Chemical Process

Question: Calcination of gypsum produces
[A].

plaster of paris

[B].

salt cake

[C].

nitre cake

[D].

lime

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fire clay is __________ refractory material.
[A].

a basic

[B].

an acidic

[C].

a neutral

[D].

not a

Answer: Option B

Explanation:

No answer description available for this question.

Question: Carborundum consists mainly of
[A].

bauxite

[B].

silicon carbide

[C].

boron carbide

[D].

calcium carbide

Answer: Option B

Explanation:

No answer description available for this question.

Question: Carbon disulphide is mainly used in the production of
[A].

viscose rayon.

[B].

corundum.

[C].

plasticiser for unsaturated polyester.

[D].

paints.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Coke used for the production of calcium carbide should have
[A].

low ash content.

[B].

low ignition temperature.

[C].

high electrical resistivity.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Bromine is used in the preparation of
[A].

fire extinguishing compounds.

[B].

fire proofing agents.

[C].

dyes and antiknock compounds.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Bromine content in sea water may be around __________ ppm.
[A].

70

[B].

640

[C].

1875

[D].

2500

Answer: Option A

Explanation:

No answer description available for this question.

Question: Bitterns is a/an
[A].

unsaturated fat.

[B].

starting material for the production of iodine.

[C].

by-product of chlor-alkali industry.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: In the Solvay process, the product from the calciner is
[A].

light soda ash

[B].

dense soda ash

[C].

sodium bicarbonate

[D].

dehydrated soda ash

Answer: Option A

Explanation:

No answer description available for this question.

Question: Dense soda ash used in the manufacture of glass, is chemically represented by
[A].

Na2CO3

[B].

Na2CO3.10H2O

[C].

Na2CO3.H2O

[D].

Na2HCO3

Answer: Option C

Explanation:

No answer description available for this question.