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Question

Find the oxidation number of nitrogen in each case :

N in NH3,NH2OH,NaN3 and NH4NO2.

A
3,1,13,+3 &3
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B
3,2,13,+1
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C
3,1,1,+2
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D
None of the above
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Solution

The correct option is A 3,1,13,+3 &3
The oxidation number of N in NH3,NH2OH,NaN3 and NH4NO2 are 3,1,13,+3/3 respectively.
Let X be the oxidation number of N in NH3.
X+3=0
X=3

Let X be the oxidation number of N in NH2OH.
X+32=0
X=1

Let X be the oxidation number of N in NaN3.
1+3X=0
X=13

Oxidation state of N in NH4NO2,
The given molecule is made up of the combination of two ions which are ammonium ion (NH4+) and nitrate ion (NO2). In this, nitrate ion is the counter ion.

Now we have to determine the oxidation number of N in both the ions.

The oxidation number of N in NH4+:
X+4=1
X=3

The oxidation number of N in NO2:
X4=1
x=+3


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