250+ TOP MCQs on Inorganic Chemical – Chloro – Alkali Industries and Answers

Chemical Industry Multiple Choice Questions on “Inorganic Chemical – Chloro – Alkali Industries”.

1. Which one mentioned below is not a major industrial chemical produced by chloro-alkali industry?
a) Soda ash
b) Caustic soda
c) Chlorine
d) Ammonium carbonate

Answer: d
Clarification: The chloro alkali industry represents production of three major industrial chemicals:
Soda ash(sodium carbonate), caustic soda(sodium hydroxide), chlorine(Cl₂). Thus ammonium carbonate is not a chloro-alkali product.

2. Which one is dual process?
a) Na₂CO₃+NH₄Cl
b) Na₂CO₃+NaCl
c) NH₄Cl+Ca(OH)²
d) CaCO₃+NaCl

Answer: a
Clarification: Ammonium chloride and calcium hydroxides reacts in solvay process along with calcium carbonate and sodium chloride while sodium carbonate and ammonium chloride reacts in dual process.

3. What is the input bulk requirements for the solvay process?
a) Salt, coal and water
b) Salt, coal and limestone
c) Salt, limestone and water
d) Coal, limestone and water

Answer: b
Clarification: Input bulk requirements for the solvay process are salt, coal and limestone Salt is used as brine pumped from deep walls or as crystalline sat via evaporation procedures.

4. In solvay process, where purified brine is pumped?
a) CO absorber tower
b) H₂O absorber tower
c) NH₃ absorber tower
d) Carbonation tower

Answer: c
Clarification: In solvay or ammonia-soda process, the purified brine is pumped to the ammonia absorber tower where it dissolves NH₃ with liberation of heat. Some CO₂ also dissolves in this tower.

5. What is the modification of the dual process?
a) Recovery of NH₄Cl as co-product
b) Recovery of NH₃ as co-product
c) Recovery of NaHCO₃ as co-product
d) Recovery of NH₃4(NO₃) as co-product

Answer: a
Clarification: The principal modification of the dual process is the recovery of NH₄Cl as a co-product rather than the liberation of the contained ammonia for recycle as in the solvay process.

6. What is the disadvantage of solvay process?
a) No co-products to dispose
b) Use of low-grade brine
c) Higher salt consumption
d) Low corrosion problems

Answer: c
Clarification: The advantages of solvay process are-can use low-grade brine, less electric power, less corrosion problems, no co-products to dispose while disadvantages are higher salt consumption, more stream consumption etc.

7. Which one is a NaOH process with no Cl₂ co-product?
a) HCl-air oxidation with Fe₂O₃
b) HCl-air-Cl₂ oxychlorination
c) HNO₃-Nacl-air process
d) Na₂CO₃– Ca(OH)²

Answer: d
Clarification: Na₂CO₃-Ca(OH)² process is the production of NaOH with no Cl₂ co-product while HCl-air oxidation with Fe₂O₃ catalyst, HCl-air-Cl₂ oxychlorination process are the production chlorine without any co-products.

8. Where ‘denuding’ is occur_______
a) Diaphragm cell
b) Mercury cell
c) Membrane cell
d) Voltaic cell

Answer: b
Denuding reaction occurs in the mercury cell of electrolytic process of chlorine production. In denuding reaction amalgam reacts with water to produce sodium hydroxide, hydrogen and chlorine.

9. Why minor quantities of Na₂CO₃ required in electrolysis process?
a) For Cl₂ drying
b) For high purity brine
c) For salt purification
d) For high purity depleted brine

Answer: c
Clarification: Electrolysis process of chlorine production contains diaphragm cell and mercury cell. In this process,minor quantities of Na₂CO₃ and NaOH required for the salt purification while H₂SO₄ is required for Cl₂ drying.