The correct bond order in the following species is

The correct statement$(s)$ about $O _3$ is (are)

$(A)$ $O$ - $O$ bond lengths are equal.

$(B)$ Thermal decomposition of $O _3$ is endothermic.

$(C)$ $O _3$ is diamagnetic in nature.

$(D)$ $O _3$ has a bent structure.

When $O _2$ is adsorbed on a metallic surface, electron transfer occurs from the metal to $O _2$. The $TRUE$ statement$(s)$ regarding this adsorption is(are)

$(A)$ $O _2$ is physisorbed

$(B)$ heat is released

$(C)$ occupancy of $\pi_{2 p }^*$ of $O _2$ is increased

$(D)$ bond length of $O _2$ is increased

The correct order for $O-O$ bond length in given substance is

$I.$ $H_2O_2$     $II.$ $O_2$      $III.$ $O_3$

The bond order in $NO$ is $2.5$ while that in $N{O^ + }$ is $3.$ Which of the following statements is true for these two species

$AX$ is a covalent diatomic molecule where $A$ and $X$ are second row elements of periodic table. Based on Molecular orbital theory, the bond order of $AX$ is $2.5$. The total number of electrons in $AX$ is ........... (Round off to the Nearest Integer).