Identify the most stable species in the following set of ions giving reasons
(a) `overset(+)(C)H_(3), overset(+)(C)H_(2) Br, overset(+)(C)HBr_(2), overset(+)(C)Br_(3)` (b) `overset(Θ)(C)H_(3), overset(Θ)(C)H_(2)Cl, overset(Θ)(C)HCl_(2), overset(Θ)(C)Cl_(3)`

Explanation

To solve the problem of identifying the most stable species in the given sets of ions, we will analyze each set step by step.

### Part (a): Stability of Carbocations

1. **Identify the Ions**: The ions given are:
- \( \overset{+}{C}H_3 \) (methyl cation)
- \( \overset{+}{C}H_2Br \) (ethyl cation with one bromine)
- \( \overset{+}{C}Br_2H \) (ethyl cation with two bromines)
...