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Question

Which of the following has been arranged in order of increasing oxidation number of nitrogen?

A
NH3<N2O5<NO<N2
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B
NO+2<NO3<NO2<N3
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C
NH+4<N2H4<NH2OH<N2O
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D
NO2<NaN3<NH+4<N2O
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Solution

The correct option is C NH+4<N2H4<NH2OH<N2O
Oxidation state of H =+1
Oxidation state of O =2
For option A oxidation state of N in NH3 is -3,in N2O5 is +5,in NO is +2. So this is not increasing order of oxidation state of nitrogen.
For option B oxidation state of N in NO+2 is +5,in NO3 is +5. So this is not increasing order of oxidation state of nitrogen.
For option C oxidation state of N in NH+4 is -3,in N2H4 is -2,in NH2OH is -1 and in N2O is +1. So this is correct answer as compounds are arranged in increasing order of oxidation number of nitrogen.
For option A oxidation state of N in NO2 is -4,in NaN3 is -1/3,in NH+4 is -3. So this is not increasing order of oxidation state of nitrogen.

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