In the above reaction, identify $P_{1}$ and $P_{2}$ respectively.

Question

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Answer 1

In the case of $H_{2} O$ /acetone, attack of nucleophile will be at alkyl halide. The carbocation will form on the ring.

In the case of $H B r$ , attack of nucleophile will be at alcohol. The carbocation will form outside the ring, and therefore the ring expansion will take place.

Primary carbocation will rearrange into secondary carbocation.

Answer 2

In the case of

H_{2} O

/acetone, attack of nucleophile will be at alkyl halide. The carbocation will form on the ring.

In the case of

H B r

, attack of nucleophile will be at alcohol. The carbocation will form outside the ring, and therefore the ring expansion will take place.

Primary carbocation will rearrange into secondary carbocation.