Chemical Process MCQs

Question 1

Oxidation of SO 2 to SO 3 is favoured by

Accepted Answer

Low temperature and high pressure

Answer

Low temperature and low pressure

Answer

High temperature and low pressure

Answer

High temperature and high pressure

Question 2

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

Accepted Answer

All of the above

Answer

Has larger production capacity per unit cell

Answer

Consumes less power per ton of Cl 2 produced

Answer

Produces high purity (70%) caustic soda directly

Question 3

Pick out the endothermic reaction out of the following.

Accepted Answer

CaCO 3 = CaO + CO 2

Answer

C + $$\frac{1}{2}$$O 2 = CO

Answer

CO + 3H 2 = CH 4 + H 2 O

Answer

CO + $$\frac{1}{2}$$O 2 = CO 2

Question 4

Portland cement consists mainly of

Accepted Answer

CaO & SiO 2

Answer

SiO 2 & Al 2 O 3

Answer

CaO & Al 2 O 3

Answer

CaO & FE 2 O 3

Question 5

Prussian blue is chemically represented by

Accepted Answer

Fe 4 [Fe(CN 6 ) 3 ]

Answer

FeO.TiO 2

Answer

CaSO 4 .2H 2 O

Answer

AlF 3 .3N a F

Question 6

More than 100 percent of __________ is present in oleum.

Accepted Answer

H 2 SO 4

Answer

SO 3

Answer

H 2 SO 3

Answer

SO 2

Question 7

Dry ice (solidified CO 2 ) is used for the

Accepted Answer

Storage & shipment of frozen foods and ice-creams

Answer

Liquefaction of permanent gases

Answer

Liquefaction of natural gas

Answer

None of these

Question 8

Which of the following is an endothermic reaction?

Accepted Answer

Both B and C

Answer

Absorption of SO 3 in 98% H 2 SO 4

Answer

C + H 2 O = CO + H 2

Answer

Thermal dissociation of iron pyrites

Question 9

Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?

Accepted Answer

H 2

Answer

Na 2 CO 3

Answer

NaHCO 3

Answer

None of these