MCQ
Match list $I$ with list $II$ and select the correct answer
list $I$ (species) list $II$ ( $O-N-O$ angle)
$(A)$ $NO_2^+$ $(1)$ $180^o$
$(B)$ $NO_2$ $(2)$ $132^o$
$(C)$ $NO_2^-$ $(3)$ $120^o$
$(D)$ $NO_3^-$ $(4)$ $115^o$
  $(5)$ $109^o$
  • A
    $A-5,\,\,\,B-4,\,\,\,C-3,\,\,\,D-2$
  • B
    $A-5,\,\,\,B-2,\,\,\,C-4,\,\,\,D-3$
  • $A-1,\,\,\,B-2,\,\,\,C-4,\,\,\,D-3$
  • D
    $A-1,\,\,\,B-4,\,\,\,C-3,\,\,\,D-2$

Answer

Correct option: C.
$A-1,\,\,\,B-2,\,\,\,C-4,\,\,\,D-3$
c
$NO _2^{+}$ is $sp$ and linear i.e. bond angle is $180^{\circ}$.

$NO _2$ has a bond angle of $132^0$

$NO _2^{-}$ is $sp^2$ and bond angle is less than $120^{\circ}$ due to lone pair bond pair repulsion.

$NO _3^{-}$ is $sp^2$ and trigonal planar i.e. bond angle is $120^{\circ}$.

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