SSC CGL 2022 PYQ — Question 44

SSC CGL - 02 Dec 2022 - Shift 1 • General Awareness • Q44

Identify the correct chemical formula of chloroform.

Show answer & explanation

Correct answer: A

Explanation

The correct answer is option 1 i.e. CHCl3

Chloroform, or trichloromethane (often abbreviated as TCM), is an organic compound with the formula CHCl3 and a common organic solvent.Other names for chloroform are trichloromethane and methyl trichloride.

  • Chloroform is a man-made by-product formed when chlorine is used to disinfect water.
  • Chloroform is also used in industrial processes. It is a colorless liquid with a pleasant, non-irritating smell and a slightly sweet taste.
  • It is nonflammable.
  • Chloroform is used as a solvent, a substance that helps other substances dissolve. Also, it is used in the building, paper and board industries, and in pesticide and film production.
  • Chloroform reaction: Chloroform is obtained by heating ethyl alcohol, aceteldihyde or any methyl kiton such as acetone and methyl ethyl kiton with an aqueous solution of chlorine and an alkali. This reaction is called chloroform reaction.

Chloroform Reaction-

Reaction of acetone chlorine and NaOH solution

Chloroform Preparation:

 CH3COCH3 + 3Cl2 → CCl3COCH3 + 3HCl

CCl3COCH3 + NaOH → CHCl3 + CH3COONa

[HCl + NaOH → NaCl + H2O] x 3

Final Reaction :

CH3COCH3 + 3Cl2 + 4NaOH → CHCl3 + CH3COONa + 3NaCl + 3H3O