CHEMICAL ENGINEERING

Question: Maximum nitrogen percentage is in
[A].

ammonium sulphate.

[B].

calcium ammonium nitrate.

[C].

urea.

[D].

liquid ammonia.

Answer: Option D

Explanation:

No answer description available for this question.

Question: In the manufacture of urea, the intermediate chemical formed is
[A].

biuret

[B].

ammonium carbamate

[C].

ammonium carbonate

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an ammonia plant, the purge off is essential to
[A].

maintain inert gas concentration within a limit.

[B].

remove excess poisonous gases.

[C].

maintain H2 : N2 ratio at 3 :1.

[D].

remove uncondensed ammonia vapour.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
[A].

steam reforming of naphtha and cracking of natural gas.

[B].

electrolysis of water.

[C].

cryogenic separation of hydrogen from coke oven gas.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: I argest capacity nitrogenous fertiliser plants (2700 tons of NH3 per day) (2 Nos) in India are located at
[A].

Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat).

[B].

Talchar (Orissa) and Ramagundam (A.P.) both under FCI.

[C].

Korba (M.P.) and Talchar (Orissa) both under FCI.

[D].

Haldia (W.B) and Namrup (Assam) both under HFC.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by
[A].

adsorption on palladium.

[B].

cryogenic operations (low temperature cooling).

[C].

absorption (using ethanolamine or pyragalloll solution).

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of
[A].

comparatively higher pressure drop.

[B].

high cost of the high pressure vessel used for the reactor.

[C].

higher pumping cost.

[D].

chances of entrainment and disturbance of catalyst bed.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.
[A].

mixed

[B].

complex

[C].

highly hygroscopic

[D].

highly explosive

Answer: Option B

Explanation:

No answer description available for this question.

Question: Electric process as compared to wet process (for the manufacture of phosphoric acid)
[A].

can use only high grade phosphate rock.

[B].

is used less frequently.

[C].

produces a valuable by-product called gypsum.

[D].

is weak acid process.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Monte catini process is a widely used process for the manufacture of
[A].

urea

[B].

calcium ammonium nitrate

[C].

triple superposphate

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.