Chemical Engineering

Question: Permanent hardness of water is due to the presence of calcium & magnesium
[A].

bi-carbonates

[B].

sulphates & chlorides

[C].

carbonate

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Glauber’s salt is chemically
[A].

calcium sulphate

[B].

potassium sulphate

[C].

potassium chlorate

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Gypsum is chemically
[A].

calcium chloride

[B].

potassium sulphate

[C].

sodium sulphate

[D].

calcium sulphate

Answer: Option D

Explanation:

No answer description available for this question.

Question: Cement mainly contains
[A].

CaO, SiO2, Al2O3

[B].

MgO, SiO2, K2O

[C].

Al2O3, MgO, Fe2O3

[D].

CaO, MgO, K2O

Answer: Option A

Explanation:

No answer description available for this question.

Question: Mercury cells for caustic soda manufacture, compared to diaphragm cells
[A].

require lower initial investment.

[B].

require more power.

[C].

produce lower concentration NaOH.

[D].

none of these.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Economics of ‘Solvay Process’ depends upon the efficiency of
[A].

carbonating tower

[B].

ammonia recovery

[C].

ammonia recovery and size of the plant

[D].

ammoniation of salt solution

Answer: Option C

Explanation:

No answer description available for this question.

Question: Oxygen is produced by fractionation of air using __________ process.
[A].

Linde’s

[B].

Claude’s

[C].

either (a) or (b)

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Contact process of sulphuric acid manufacture
[A].

yields acid of higher concentration than chamber process.

[B].

yields acids of lower concentration than chamber process.

[C].

is obsolete.

[D].

eliminates absorber.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
[A].

SO3 gas is sparingly soluble in water.

[B].

water forms an acid mist, which is difficult to absorb.

[C].

the purity of acid is affected.

[D].

scale formation in the absorber is to be avoided.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
[A].

V2O5 & Cr2O3.

[B].

oxides of nitrogen & Cr2O3.

[C].

V2O5 on a porous carrier & oxides of nitrogen.

[D].

oxides of nitrogen & V2O5 on a porous carrier.

Answer: Option D

Explanation:

No answer description available for this question.