Chemical Process

Question: Mannheim furnace is used in the manufacture of
[A].

hydrochloric acid.

[B].

H2SO4 by Chamber process.

[C].

calcium carbide.

[D].

corundum.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
[A].

has larger production capacity per unit cell.

[B].

consumes less power per ton of Cl2 produced.

[C].

produces high purity (70%) caustic soda directly.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
[A].

gives higher conversion efficiency.

[B].

has a longer life and is not poisoned by arsenic.

[C].

handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Absorption of SO3 in 97% H2SO4 is
[A].

exothermic

[B].

endothermic

[C].

not possible

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
[A].

it is very corrosive at elevated temperature.

[B].

its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).

[C].

it decomposes on further increasing the temperature.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Dacron (or terylene) fibres as compared to nylon’fibres have
[A].

better heat & acid resistant properties.

[B].

poorer resistance to alkalis.

[C].

poorer dyeability.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Dacron is a
[A].

condensation product of hexam-ethylene diamine and adipic acid.

[B].

thermosetting material.

[C].

condensation product of dimethyl terephthalate and ethylene glycol.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Nylon-6 is a
[A].

polyamide

[B].

thermosetting resin

[C].

polyester

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Nylon-6 as compared to Nylon-66 is having higher
[A].

hardness

[B].

abrasion/resistance

[C].

melting point

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Bakelite is
[A].

same as poly tetrafluoroethylene (PTFE).

[B].

an inorganic polymer.

[C].

same as thermosetting phenol-formaldehyde.

[D].

not a polymer.

Answer: Option C

Explanation:

No answer description available for this question.