Question

Q26. Addition of HBr to propene give isopropyl bromide as major product as per ?
(a) Swarts reaction (b) Saytzeff's rule (c) Markownikoff's rule (d) peroxide effect
Q27. Kharasch - effect of reagent contains ?
(a) attachment of the -ve part to that unsaturated carbon atom which carries more number of hydrogen atom
(b) attachment of the ve part to that unsaturated carbon atom which carries ten number of hydrogen atom.
(c) attachment of the + ve part of the reagent to that unsaturated carbon atom which carries more number of alkyl group
(d)attachment of the tive part of the reagent to that unsaturated carbon atom which carries less number of alkyl group​

Answer 1

26. Markownikoff's rule is the correct answer.

According to Markownikoff's rule, (-ve) part of adding molecule associate with carbon having less number of Hydrogen.

Addition of HBr is an electrophilic addition reaction and in such type of reactions, Markownikoff's rule holds true.

27. In Kharash effect, net addition of Br⁻ at pi bond takes place opposite to Markownikoff's rule without rearrangement i.e. (-ve) part attach on carbon having more number of hydrogen atom.

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