Question

The following are some statements about oxides of VA group elements,

i) $NO$ readily reacts with $O_2$ to form reddish-brown gas.

ii) The formula of Brown ring is $\left[Fe\right(H_{2}O{)}_{5}NO]S{O}_4$.

iii) $N_2{O}_3$ is called laughing gas.

The correct combination is:

• A. All are correct.
• B. I & III are correct.
• C. I & II are correct.
• D. II & III are correct.

Answer 1

The correct option is C I & II are correct.

Nitric oxide reatcs with oxygen gas to form nitrogen dioxide a dark brown gas.

2$NO$ + $O_2$$\to$$2N{O}_2$

The brown ring complex molecular formula is $\left[Fe\right(H_{2}O{)}_{5}NO]S{O}_4$.

Laughing gas is nitrous oxide $N_{2}O$.

Hence, the correct option is $\text{C}$