Question

Which of the following is the wrong statement?

• A. ONCl and $ONO^-$ are not isoelectronic
• B. $O_3$ molecule is bent
• C. Ozone is violet-black in solid state
• D. Ozone is diamagnetic gas

Answer 1

Answer: (C)

Ozone is violet-black in solid state

Answer 2

(a) $ONCl= 8+ 7+ 17= 32e^-$ $ONO = 8 + 7 + 8 + 1 = 24e^-$ (correct)
(b) Central O-atom is $sp^2$-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) $0_3$ has no unpaired electrons, so diamagnetic (correct).

Hence, the correct option is (C): Ozone is violet-black in solid state.