250+ TOP MCQs on C1 Compounds – Chloromethanes and Answers

Chemical Technology Multiple Choice Questions on “C1 Compounds – Chloromethanes”.

1. What is the molecular weight of chloroform?
a) 119.5
b) 50.5
c) 85
d) 154

Answer: a
Clarification: Molecular formula of chloroform isCHCl₃. It has 1 Carbon atom, 1 hydrogen atom, and 3 chlorine atoms; hence the molecular weight of methanol is 1*12+1*1+3*35.5=119.5.

2. Which of the following chemical is soluble in water?
a) Methylene Chloride
b) Methyl Chloride
c) Chloroform
d) Carbon tetrachloride

Answer: b
Clarification: Methyl chloride is soluble in water whereas Methylene chloride, chloroform, and carbon tetra chloride are miscible with alcohols and ethers and slightly soluble in water.

3. Which of the following product statements regarding chloro methane’s are wrong?
a) Chlorinated methane’s are used as solvents
b) Methane chlorination is an endothermic reaction
c) Azeotropic mixture of HCl-H₂O is circulated in the tower, if dry HCl is required
d) Caustic soda solution is used to remove HCl and CO₂ from chlorinated gases

Answer: b
Clarification: Methane chlorination is an exothermic reaction; hence it is a wrong statement. The heat evolved is recovered and used for preheating the inlet gas.

4. Product ratio varies as methane to chlorine ratio varies in methane chlorination process.
a) True
b) False

Answer: a
Clarification: The statement is true because basing on product ratio desired, the methane/chlorine ratio is fixed. For feed ratio of 1.8, the product compositions obtained are 60% CH₃Cl, 28% CH₂Cl₂, 9% CHCl₃, and 3% CCl₄.