Which of the following does not give oxygen on heating?

Which of the following coenzymes is a derivative of pantothenic acid (Vitamin $B$ complex)?

The electric field at a place is given by $\overrightarrow E = E_0 \widehat i \, V/m$. $A$ particle of charge $+q_0$ moves from point $A(0, a)$ to $B(a, 0)$ along a circular path. Find the work done by the electric field in this motion.

Two coherent point sources $S_1$ and $S_2$ vibrating in phase emit light of wavelength $\lambda$. The separation between them is $2 \lambda$ as shown in the figure. The first bright fringe is formed at $P$ due to interference on a screen placed at a distance $D$ from $S_1$ $(D >> \lambda)$. Then the distance $OP$ is:

$CrO_3$ dissolves in aqueous $NaOH$ to give:

Which one of the following ions has the same number of unpaired electrons as those present in $V^{3+}$ ion?