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  4. In which substance does nitrogen exhibit the lowest oxidation state?

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Q. In which substance does nitrogen exhibit the lowest oxidation state?

MHT CETMHT CET 2018The p-Block Elements - Part2

Solution:

Oxidation state of nitrogen gas $(N_{2})$ is zero, as both the nitrogen atom possess same electronegativity as well as same number of electrons. The oxidation states of ammonia, nitrous oxide and nitric oxide are given below. Ammonia $(NH_{3})$

$x+3 (1) =0 $

$x =-3$

Nitrous oxide $\left( N _{2} O \right)$

$2(x)+1(-2) =0 $

$2x =2$

$x =+1$

Nitric oxide (NO)

$x+(-2)=0$

$x=+2$

Thus, nitrogen exhibits lowest oxidation state in case of ammonia