Identify the type of reaction:

Step-by-step solution

The reaction shown is the addition of hydrogen bromide (HBr) to propene ( CH₃-CH=CH₂ ). The reaction proceeds via the electrophilic addition mechanism. In the first step, the electrophile H⁺ from HBr attacks the double bond to form the more stable secondary carbocation ( CH₃-CH⁺-CH₃ ). In the second step, the nucleophile Br⁻ attacks the carbocation to form 2-bromopropane ( CH₃-CH(Br)-CH₃ ). This follows Markovnikov's rule, which is characteristic of electrophilic addition reactions to alkenes. Answer: Electrophilic