Chemical Process MCQs

Question 1

Hydrazine (N 2 H 4 ) is used mainly as a/an

Accepted Answer

Rocket fuel

Answer

Explosive

Answer

Detergents additive

Answer

None of these

Question 2

Chemical formula of oleum is

Accepted Answer

H 2 S 2 O 7

Answer

H 2 SO 3

Answer

H 2 SO 4

Answer

H 2 SO 7

Question 3

Which of the following processes does not produce Cl 2 as a co-product during the manufacture of caustic soda?

Accepted Answer

Lime-soda process

Answer

Diaphragm electrolytic cell process

Answer

Mercury electrolytic cell process

Answer

None of these

Question 4

Manufacture of phthalic anhydride uses __________ as a catalyst.

Accepted Answer

V 2 O 5

Answer

Ni

Answer

Cr

Answer

Al 2 O 3

Question 5

Viscose rayon . . . . . . . .

Accepted Answer

Utilises H 2 SO 4 , NaOH and CS 2 during its manufacture

Answer

Cannot be made from sulphite pulp

Answer

Cannot yield textile grade fibre

Answer

None of these

Question 6

Permanent hardness of water can be removed by

Accepted Answer

Boiling it with Na 2 CO 3

Answer

Boiling

Answer

Adding Ca(OH) 2

Answer

None of these

Question 7

Polymerisation product of C 2 F 4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called

Accepted Answer

Teflon

Answer

Polyurethane

Answer

Silicone

Answer

Epoxy resin

Question 8

Oleum produces fumes of

Accepted Answer

SO 3

Answer

SO 2

Answer

H 2 SO 4

Answer

SO 2 + H 2 SO 4

Question 9

Pick out the false statement pertaining to water treatment.

Accepted Answer

The zeolite water softening process reduces the hardness of water by not more than 50%

Answer

Aeration of water is effective in CO 2 removal

Answer

Sodium sulphate or sodium carbonate do not cause hardness in water

Answer

Water with pH value less than 7, is acidic