MCQ
Which of the following is the wrong statement?
- ✓$ONCl$ and $ONO^-$ are isoelectronic.
- B$O_3$ molecule is bent
- COzone is violet-black in solid state
- DOzone is diamagnetic gas.
✓
Answer
Correct option: A.
$ONCl$ and $ONO^-$ are isoelectronic.
(a) Number of electrons in
$\begin{array}{l}\mathrm{ONCl}=3.2 \mathrm{e}^{-} \\\mathrm{ONO}^{-}=24 \mathrm{e}^{-}\end{array}$
Thus, ONCl and ONO- are not isoelectronic.
(b) $\mathrm{O}_{3}$ has bent shape structure. Central atom O is $s p^{2}$ hybridised with 1 lone pair of electrons.
(c) Ozone is violet-black in solid state.
(d) $O_{3}$ has no unpaired electrons, thus it is diamagnetic.
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