CHEMICAL ENGINEERING

Question: __________ catalyst is used in the production of urea from CO2 and NH3.
[A].

Vanadium pentoxide

[B].

No

[C].

Alumina

[D].

Nickel

Answer: Option B

Explanation:

No answer description available for this question.

Question: Ammonium nitrate is
[A].

having about 40% N2.

[B].

not hygroscopic.

[C].

not prone to explosive thermal decomposition.

[D].

mixed with limestone powder to reduce its explosive nature before using it as a fertilizer.

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ is not a fertiliser.
[A].

Calcium ammonium nitrate

[B].

Ferrous sulphate

[C].

Liquid ammonia

[D].

Ammonium sulphate

Answer: Option B

Explanation:

No answer description available for this question.

Question: Main constituent of phosphate rock is
[A].

ammonium phosphate

[B].

flour apatite

[C].

calcium fluoride

[D].

calcium phosphate

Answer: Option B

Explanation:

No answer description available for this question.

Question: Both white phosphorous as well as red phosphorous
[A].

are soluble in CS2.

[B].

burns when heated in air.

[C].

reacts with hot caustic soda solution to give phosphine.

[D].

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

Answer: Option B

Explanation:

No answer description available for this question.

Question: CaH4(PO4)2 is the chemical formula of
[A].

superphosphate

[B].

triple superphosphate

[C].

calcium phosphate

[D].

meta phosphoric acid

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heating of orthophosphoric acid to 250°C produces
[A].

metaphosphoric acid

[B].

pyrophosphoric acid

[C].

no change in it

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heating of orthophosphoric acid to about 900°C, produces
[A].

metaphosphoric acid

[B].

pyrophosphoric acid

[C].

no change in it

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Low grade coal is __________ to produce ammonia synthesis gas.
[A].

hydrogenated

[B].

liquefied

[C].

gasified

[D].

dehydrogenated

Answer: Option C

Explanation:

No answer description available for this question.

Question: In natural gas, the C/H ratio (by weight) varies in the range of
[A].

3-4

[B].

8-10

[C].

15-17

[D].

20-25

Answer: Option A

Explanation:

No answer description available for this question.