Redox Reactions Ques 8
8. When $Cl_2$ 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 $-3$
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Answer:
Correct Answer: 8.(b)
Solution:
- (b) On reaction with hot and concentrated alkali a mixture of chloride and chlorate is formed
$3 Cl_2+3 NaOH$ (excess) $\xrightarrow{\text{ Hot }}$ $5 NaCl+NaClO_3+3 H_2 O $
BETA
