pBlock ElementsII 1 Question 15
15. Which of the following is the wrong statement? (2013 Main)
(a) $\mathrm{ONCl}$ and $\mathrm{ONO}^{-}$are not isoelectronic
(b) $\mathrm{O} _{3}$ molecule is bent
(c) Ozone is violet-black in solid state
(d) Ozone is diamagnetic gas
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Answer:
Correct Answer: 15. (c)
Solution:
- (a) $\mathrm{ONCl}=8+7+17=32 e^{-}$
$\mathrm{ONO}^{-}=8+7+8+1=24 e^{-}$(correct)
(b) Central O-atom is $s p^{2}$-hybridised with 1 lone pair, so bent shape (correct).
(c) In solid state, ozone is violet-black. Ozone does not exist in solid state, thus incorrect.
(d) $\mathrm{O} _{3}$ has no unpaired electrons, so diamagnetic (correct). Hence, (c) is the correct.
