4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

$A.$  has completely filled antibonding molecular orbitals
$B.$  is diamagnetic
$C.$   has bond order one
$D.$  is isoelectronic with Neon

$B _{2}, Li _{2}, C _{2}, C _{2}^{-}, O _{2}^{2-}, O _{2}^{+}$and $He _{2}^{+}$

$Pt ( s )\left| H _{2}( g )\right| H ^{+}( aq ) \| Ag ^{+}( aq ) \mid Ag ( s )$

$E _{\text {Cell }}^{0}=+0.5332 V$.

The value of $\Delta_{ f } G ^{0}$ is $kJ \,mol ^{-1} \cdot$ (in nearest integer)

$F - H - \frac{a}{{}} -  - {F^ - }$               $F - H - \frac{b}{{}} -  - F$

$O - H - \frac{c}{{}} -  - N$                     $O - H - \frac{d}{{}} -  - O$