CBSE Class 10 Sample Paper Science Solution - For 2023 Boards

In the redox reaction

MnO 2 + 4H Cl → MnCl 2 + 2H 2 O + Cl 2

 

  1. MnO 2 is reduced to MnCl2& HCl is oxidized to H 2 O
  2. MnO 2 is reduced to MnCl 2 & HCl is oxidized to Cl 2
  3. MnO 2 is oxidized to MnCl 2 & HCl is reduced to Cl 2
  4. MnO 2 is oxidized to MnCl 2 & HCl is reduced to H 2 O

 

Answer:

Reaction between 4HCl and MnO2 - Teachoo.jpg

A REDOX reaction is where oxidation and reduction occur simultaneously in a reaction.

A substance is oxidised when:

  • It gains Oxygen
  • It loses Hydrogen
  • It loses electrons

A substance is reduced when:

  • It loses Oxygen
  • It gains Hydrogen
  • It gains electrons
    • Here, MnO2 loses its oxygen to form MnCl2.
    • Hence it is getting reduced.
    • HCl loses its H to form Cl2.
    • It is getting oxidised.

 

Therefore, the correct answer is (b) MnO 2 is reduced to MnCl 2 & HCl is oxidised to Cl 2  

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo