Consider the species $CH _{4}, NH _{4}^{+}$and $BH _{4}^{-}$. Choose the correct option with respect to the there species .... .
They are isoelectronic and only two have tetrahedral structures
They are isoelectronic and all have tetrahedral structures
Only two are isoelectronic and all have tetrahedral structures
Only two are isoelectronic and only two have tetrahedral structures
Assertion : $B_2$ molecule is diamagnetic.
Reason : The highest occupied molecular orbital is of $\sigma $ type.
The correct order of energies of molecular orbitals of $N _2$ molecule, is
The number and type of bonds in $C_2^{2 - }$ ion in $CaC_2$ are
Select incorrect statement
When $\psi_{\mathrm{A}}$ and $\Psi_{\mathrm{B}}$ are the wave functions of atomic orbitals, then $\sigma^*$ is represented by :