Chemical Process

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.

Question: Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is
[A].

0.14

[B].

0.34

[C].

0.94

[D].

1.4

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chemical name of Grignard reagent is
[A].

sodium thiosulphate.

[B].

ethyl magnesium chloride.

[C].

sodium sulphite.

[D].

sodium bicarbonate.

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
[A].

Solvay

[B].

Ostwald’s

[C].

Haber’s

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
[A].

10

[B].

25

[C].

50

[D].

98

Answer: Option A

Explanation:

No answer description available for this question.

Question: Oxidation of SO2 to SO3 is favoured by
[A].

low temperature and low pressure.

[B].

low temperature and high pressure.

[C].

high temperature and low pressure.

[D].

high temperature and high pressure.

Answer: Option B

Explanation:

No answer description available for this question.