CGP Edu

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Halogens and their Compounds Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

Give equations of the following –

(i) How chlorine is obtained from the following

substances–

HCl NaBrO3 KI

NaCl HBr NaIO3

KClO3 KBr (iii) How iodine is obtained from the following substances– HI

Bleaching powder (ii) How bromine is obtained from the following substances–

Text Solution

Verified by Experts

The correct answer is:

CHECK THE SOLUTION.

Sol. (i) MnO2 + 4HCl ⎯→ MnCl2 + 2H2O + Cl2

By doing electrolysis of NaCl solution

2KClO3 + I2 ⎯→ 2KIO3 + Cl2

CaOCl2 + H2SO4 ⎯→ CaSO4+ H2O+Cl2

CaCl2 + CO2 ⎯→ CaCO3 + Cl2

(ii) MnO2 + 4HBr ⎯→ MnBr2 + Br2 + 2H2O

Cl2 + 2HBr ⎯→ 2HCl + Br2

5NaBr + NaBrO3 + 6HCl ⎯→

6NaCl + 3Br2 + 3H2O

By heating KBr with MnO2 and conc. H2SO4 or by passing Cl2 throught KBr solution

(iii) 2KI + H2O2 ⎯→ 2KOH + I2

2NaIO3 + 5NaHSO3 ⎯→

3NaHSO4 + 2Na2SO4 + H2O + I2

2HI + Cl2 ⎯→ 2HCl + I2

Previous Question Next Question

Get practice questions, solutions, and test series in one place.

Share your experience with this question and solution.

Send your comment, doubt, correction, or feedback to admin.

What students say about this solution

No reviews yet. Be the first to write a review.