250+ TOP MCQs on Inorganic Chemicals and Answers

Chemical Technology Multiple Choice Questions on “Inorganic Chemicals”.

1. Which of the mentioned is the formula of Oleum?
a) H₂S₂O₈
b) H₂S₂O₆
c) H₂S₂O₇
d) H₂S₂O₅

Answer: c
Clarification: Oleum – (H₂SO₄+SO₃) which on summing up the like compounds will give H₂S₂O₇.

2. Which of the mentioned can be used as raw material to manufacture sulphuric acid?
a) Iron pyrites
b) Elemental Sulphur
c) Hydrogen Sulphide
d) All of the mentioned

Answer: d
Clarification: Iron pyrites (FeS), Elemental Sulphur(S), Hydrogen Sulphur(H₂S) all the mentioned has Sulphur so they can be used as raw material to manufacture sulphuric acid.

3. Which of the mentioned are constituents of producer gas?
a) CO, N₂, H₂
b) CO, H₂
c) H₂, CH₄, CO
d) LPG

Answer: a
Clarification: Producer gas is produced from Coke, Air, and Steam as raw materials. So, CO,N₂ and H₂ will be the consituents.

4. In the manufacture of Acetylene (C₂H₂) by Wulff Process, Which of the following methods is involved?
a) Heating of copper tube
b) Use of Calcium Carbide
c) Reforming
d) Pyrolsis of hydrocarbons

Answer: d
Clarification: Except option ‘Pyrolsis of hydrocarbons’, The others also yield C₂H₂ but Wulff process is where Pyrolysis occurs.
Eg: From propane – C₃H₈ → C₂H₂ + C₂H₄ + CH₄ + CO + H₂ + CO₂

5. Cryogenics deal with which of the following mentioned?
a) Production and utilization of low temperatures from 0 K to 123K
b) Production and utilization of low temperatures from 0 K to 273.15 K
c) Production and utilization of high temperatures from 273.15Kto 1000K
d) Production and utilization of high temperatures from 273.15K to 500K

Answer: a
Clarification: Cryogenics deal with sub zero temperatures the least mentioned in the options is 0K to 123K.

6. High purity oxygen in used in which of the mentioned cases?
a) Combustion
b) Medical purposes
c) Chemical reactions
d) Oxidation processes

Answer: b
Clarification: Medical purposes need 100% pure oxygen for respiration whereas the mentioned options take up the available free oxygen.

7. Linde’s cycle uses which of the following effects?
a) Newton’s law of cooling
b) Fouriers law
c) Joule Thomson cooling
d) Fick’s law

Answer: c
Clarification: Linde’s cycle achieves liquefaction of gases by expansion through a throttle valve adiabatically which is known as Joule-Thomson cooling.

8. The three major components that are necessary in a fertilizer are?
a) Na, K, S
b) N, P, S
c) N, Cl, K
d) N, P, K

Answer: d
Clarification: Nitrogen promotes development of stems and leaves, Phosphorus stimulates early growth and accelerates seeding and Potassium is essential for development of grains, sugars etc.

9. Ammonia manufactured by Haber’s process uses which of the mentioned as catalyst?
a) Iron
b) Molybdenum
c) Titanium
d) Zinc

Answer: a
Clarification: In Haber’s process, Iron is used as catalyst and Molybdenum is used as promoter.

10. Which of the mentioned can be used as an explosive and a fertilizer?
a) Ammonium Carbamate
b) Urea
c) Ammonium Chloride
d) Ammonium Nitrate

Answer: d
Clarification: Ammonium nitrate when exposed to high temperatures or mixed with combustible materials explodes.