Question

Match List I with II and select the correct answer.

List I (species)	List II (O - N - O angle)
A. $N{O}_2^{+}$	1. ${180}^o$
B. $N{O}_2$	2. ${132}^o$
C. $N{O}_2^{-}$	3. ${120}^o$
D. $N{O}_3^{-}$	4. ${115}^o$
	5. ${109}^o$

• A. $A-5,B-4,C-3,D-2$
• B. $A-5,B-2,C-4,D-3$
• C. $A-1,B-2,C-4,D-3$
• D. $A-1,B-4,C-3,D-2$

Answer 1

Answer: (C)

$A-1,B-2,C-4,D-3$

${NO}_2^{+}$ is sp and linear i.e. bond angle is ${180}^0$.
${NO}_2$ has a bond angle of ${132}^0$.
${NO}_2^{-}$ is sp2 and bond angle is less than ${120}^0$ due to lone pair bond pair repulsion.
${NO}_3^{-}$ is sp2 and trigonal planar i.e. bond angle is ${120}^0$.