Chemical Engineering

Question: Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
[A].

slaked lime

[B].

soda lime

[C].

calcium perchlorate

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Basic oxide is absent in __________ glass.
[A].

flint

[B].

pyrex

[C].

quartz

[D].

all (a), (b) & (c)

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
[A].

Oxidation of Na+ ions

[B].

Oxidation of Cl- ions

[C].

Reduction of Na+ ions

[D].

Reduction of Cl- ions

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heating of __________ to 120°C, produces plaster of paris.
[A].

blue vitriol

[B].

gypsum

[C].

calcium silicate

[D].

calcium sulphate

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ is a thermosetting plastic.
[A].

Polyvinyl chloride

[B].

Polythene

[C].

Bakelite

[D].

Teflon

Answer: Option C

Explanation:

No answer description available for this question.

Question: Concentration of sulphide ores is done usually by
[A].

roasting

[B].

smelting

[C].

froth floatation

[D].

electro magnetic separation

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chemical formula of oleum is
[A].

H2SO3

[B].

H2SO4

[C].

H2S2O7

[D].

H2SO7

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chemical name of soda ash is
[A].

sodium bicarbonate

[B].

sodium thiosulphate

[C].

potassium carbonate

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: 99.5% purity oxygen is used in
[A].

cutting and welding by oxy-acetylene flame.

[B].

hospitals for medicinal purposes.

[C].

gas masks and artificial breathing apparatus.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: CaSO4 .H2O is known as
[A].

blue vitriol

[B].

plaster of Paris

[C].

gypsum

[D].

zeolite

Answer: Option B

Explanation:

No answer description available for this question.