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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.

Question: Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
[A].

nickel

[B].

vanadium

[C].

alumina

[D].

iron

Answer: Option B

Explanation:

No answer description available for this question.

Question: Commercial production of Vanaspati is done by __________ of edible vegetable oils.
[A].

hydrogenation

[B].

oxidation

[C].

hydrolysis

[D].

hydrocracking

Answer: Option A

Explanation:

No answer description available for this question.

Question: Flux addition during smelting of ore is done to
[A].

remove impurities/gangue.

[B].

enhance rate of reaction.

[C].

accelerate reduction of ore.

[D].

separate slag from metal.

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ is an ore of lead.
[A].

Quartz

[B].

Galena

[C].

Siderite

[D].

Chalcopyrite

Answer: Option B

Explanation:

No answer description available for this question.

Question: Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
[A].

endothermic

[B].

exothermic

[C].

irreversible

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
[A].

coke and sand

[B].

brine and coal

[C].

coke and caustic soda

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
[A].

25

[B].

60-70

[C].

150-200

[D].

250-300

Answer: Option B

Explanation:

No answer description available for this question.