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Question:

The correct order of N-compounds in its decreasing order of oxidation states is:

HNO3,NH4Cl,NO,N2

NH4Cl,N2,NO,HNO3

HNO3,NO,NH4Cl,N2

HNO3,NO,N2,NH4Cl

Solution:

The correct option is B HNO3,NO,N2,NH4Cl
Oxidation state of N in HNO3 = +5
Oxidation state of N in NO = +2
Oxidation state of N in N2 = 0
Oxidation state of N in NH4Cl = -3
Hence, the correct option is B