Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with $\mathrm{H}-\mathrm{Br}_{(\mathrm{aq})}$ at the fastest rate?

Question

Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with H-Br_(aq) at the fastest rate?

MARKS Content Team · Accepted Answer

Correct answer: (C) Q. Addition of H-Br_(aq) to alkene follows electrophilic addition mechanism. In the rate determining step a carbocation intermediate is formed. Among P, Q , R \& S compound Q will form most stable carbocation intermediate since it is resonance stabilized.

Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with $\mathrm{H}-\mathrm{Br}_{(\mathrm{aq})}$ at the fastest rate?

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