Question

The oxidation state of nitrogen is correctly given for

	Compound	Oxidation state
a	$\left[ CO \left( NH _3\right)_5 Cl \right] Cl _2$	0
b	$NH _2 OH$	-2
c	$\left( N _2 H _5\right)_2 SO _4$	+2
d	$Mg _3 N _2$	-3

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (D)

a. $\left[ CO ^{+3}\left( N \overset{0}{H_3}\right)_5 Cl ^{1-}\right]^{+2} Cl _2^{-1 \times 2}$
$NH _3: x+3=0 \Rightarrow x=-3$; oxidation state of $N =$ $-3$
b. $NH _2 OH : x+3-2=0 \Rightarrow x=-1$
Oxidation state of $N =-1$
c. $\left( N _2 H _5\right)_2^{+1 \times 2} SO _4^{2-}$ :
$N _2 H _5^{\oplus}: 2 x+5=+1 \Rightarrow x=-2$
Oxidation number of $N =-2$
d. $\overset{+2 \times 3-3 \times 2}{Mg _3 N _2}$ : Oxidation state of $N =-3$