Which of the following is the wrong statement ?

Question

$\begin{array}{1 1} (1) ONCl\;and\;ONO^{−}\; are\; not\; isoelectronic \\ (2) O_3 \;molecule \;is\; bent \\ (3) Ozone\; is\; violet − black\; in\; solid\; state \\ (4) Ozone\; is\; diamagnetic\; gas. \end {array}$