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Question

Chemistry Question on Redox reactions

Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?

A

HNO3,NO,NH4Cl,N2HNO_3, NO, NH_4Cl, N_2

B

HNO3,NO,N2,NH4ClHNO_3, NO, N_2, NH_4Cl

C

HNO3,NH4Cl,NO,N2HNO_3, NH_4Cl, NO, N_2

D

NO,HNO3,NH4Cl,N2NO, HNO_3, NH_4Cl, N_2

Answer

HNO3,NO,N2,NH4ClHNO_3, NO, N_2, NH_4Cl

Explanation

Solution

Let oxidation number of N be x.
In HNO3,+1+x+3(−2)=0⇒x=+5HNO_3,+ 1 + x + 3 ( - 2 ) = 0 \Rightarrow x = + 5
In NO,      x−2=0⇒x=+2NO,\, \, \, \, \, \, x - 2 = 0 \Rightarrow x = + 2
InN 2, x = 0 InNH4Cl,x+4−1=0⇒x=−3In NH_4Cl, x + 4 - 1 = 0 \Rightarrow x = -3