Redox Reactions - Result Question 15

####16. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from :

[2012]

(a) zero to +1 and zero to -5

(b) zero to -1 and zero to +5

(c) zero to -1 and zero to +3

(d) zero to +1 and zero to -3

Show Answer

Solution:

  1. (b) On reaction with hot and concentrated alkali a mixture of chloride and chlorate is formed

3Cl2+3NaOH (excess) → Hot 

(1)5NaCl+NaClO3+3H2O

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