Among the following molecules,the $N-Si$ bond length is shortest in:

The number of molecules or ions from the following,which do not have an odd number of electrons are $...............$.
$A. NO_2$ $B. ICl_4^{-}$ $C. BrF_3$ $D. ClO_2$ $E. NO_2^{+}$ $F. NO$

Which of the following has a different number of $p_{\pi}-d_{\pi}$ bonds compared to the other molecules?

In the following electron dot structure,the correct calculation of the formal charge on the nitrogen atoms from left to right is $\overset{\centerdot \centerdot}{\mathop{N}}\text{=}\mathop{N}\text{=}\overset{\centerdot \centerdot}{\mathop{N}}$

The correct formula used to determine the formal charge $(Q_{f})$ on an atom in the given Lewis structure of a molecule or ion is ($V=$ number of valence electrons in free atom,$U=$ number of unshared electrons on the atom,$B=$ number of bonds around the atom)

Amongst the following,the number of oxide$(s)$ which are paramagnetic in nature is $Na_2O$,$KO_2$,$NO_2$,$N_2O$,$ClO_2$,$NO$,$SO_2$,$Cl_2O$.