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Anti-Markovnikov addition of HBr

28 questions on Anti-Markovnikov addition of HBr from the Organic Reaction Mechanisms II: Electrophilic and Radical Reactions chapter: 5 NEET level, 11 JEE Main, 12 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All Organic Reaction Mechanisms II: Electrophilic and Radical Reactions topics

Propene reacts with HBr in the presence of an organic peroxide. The major product is NEET level
The peroxide effect (anti-Markovnikov addition to alkenes) is observed with NEET level
In the peroxide-catalysed addition of HBr to an alkene, the species that first attacks the carbon-carbon double bond is NEET level
Propene reacts with HBr in the absence of peroxide (in the dark). The major product is NEET level
Ethene reacts with HBr (i) in the absence and (ii) in the presence of a peroxide. The product in both cases is NEET level
2-Methylpropene, (CH3)2C=CH2, is treated with HBr in the presence of benzoyl peroxide. The major product is JEE Main level
In the radical addition of HBr to propene, Br. attacks the terminal carbon because JEE Main level
Propene is treated with HI in the presence of a peroxide. The major product is JEE Main level
Styrene, C6H5CH=CH2, reacts with HBr in the presence of a peroxide. The major product is JEE Main level
Pent-1-ene is treated with HBr in the presence of (C6H5COO)2. The major product is JEE Main level
HCl does not show the peroxide effect with alkenes mainly because JEE Main level
In the free radical addition of HBr to an alkene in the presence of a peroxide, how many propagation steps make up one cycle of the chain? JEE Main level
In the peroxide effect, the radical chain is started by the peroxide ROOR through JEE Main level
Allyl chloride, CH2=CH-CH2Cl, is treated with HBr in the presence of a peroxide. The major product is JEE Main level
With HBr in the presence of a peroxide, which of the following alkene-product pairs are correct (major product)? JEE Main level
Which of the following statements about the peroxide effect are correct? JEE Main level
3,3-Dimethylbut-1-ene is treated with HBr (i) in the dark and (ii) in the presence of peroxide. The major products are respectively JEE Advanced level
Vinylcyclohexane, C6H11-CH=CH2, is treated with HBr (i) in the dark and (ii) with a peroxide. The major products are respectively JEE Advanced level
Hex-1-yne, CH3CH2CH2CH2C#CH, reacts with one equivalent of HBr in the presence of a peroxide. Ignoring E/Z isomerism, the major product is JEE Advanced level
Propene is treated with HBr in the presence of peroxide to give X. X is converted to the Grignard reagent Y with Mg in dry ether, and Y is then treated with D2O... JEE Advanced level
Using the bond dissociation energies H-Cl = 431, H-Br = 366 and secondary C-H = 410 kJ mol^-1, the enthalpy changes (kJ/mol) of the step R. + HX -> R-H + X. (R ... JEE Advanced level
2-Methylbut-2-ene is treated with HBr in the presence of a peroxide. The major product and its optical behaviour are JEE Advanced level
Assertion (A): In the presence of a peroxide, HBr adds to propene to give 1-bromopropane. Reason (R): The bromine atom adds to the terminal carbon to form the m... JEE Advanced level
Which of the following reagent sequences convert propene into propan-1-ol as the major product? JEE Advanced level
Which of the following alkenes give the same major product with HBr in the dark and with HBr in the presence of peroxide? JEE Advanced level
For the peroxide-initiated addition of HBr to propene, which of the following steps are part of the mechanism? JEE Advanced level
Which of the following statements regarding the addition of HX to alkenes under radical conditions are correct? JEE Advanced level
3-Methylbut-1-ene is treated with HBr. Which statements are correct? JEE Advanced level