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In which of the following compounds, an element exhibits two different oxidation states?

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a
NH2OH
b
NH4NO3
c
N2H4
d
N3H

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detailed solution

Correct option is B

NH4NO3 is actually NH4+and NO3-. It is an ionic compound. The oxidation number of nitrogen in the two species is different.Let, oxidation number of N in NH4+ is.x.⇒x+(4×1)=+1 or x+4=+1 or x=-3Let oxidation number of N in NO3- is x.⇒x+(3x-2)=-1 or x-6=-1 or x=+5

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