MCQ
$\mathrm{C}^{4+}$ does not exist but $\mathrm{Pb}^{4+}$ exists although both belong to the same group. This is because
- Size of carbon is much smaller than $\ce{Pb}$.
- Large amount of energy is needed in case of carbon.
- Of inert pair effect.
- Nucleus cannot hold such a large number of electrons.
- ✓Only $\ce{I}$
- B$\ce{I}$ and $\ce{II}$
- COnly $\ce{III}$
- D$\ce{II, III}$ and $\ce{IV}$
