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Question

Oxidation states of chlorine in the products when chlorine reacts with hot and conc. NaOH are:

A
-1, + 1
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B
-1, + 3
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C
-1, + 5
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D
-1, + 7
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Solution

The correct option is B -1, + 5
Cl2+2No OH(conc)hotNa1Cl+Na+5ClO3
In NaCl the oxidation state of Na is +1 thus oxidation state of chlorine is -1.
In NaClO3 the oxidation state of Na is +1 and that of oxygen is -2. Thus oxidation state of Cl will be +5.

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