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Nucleophilic Substitution in Aryl Halides

10. Assertion...

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10. Assertion Ehtene is more reactive than propene towards electrophlic attack. Reason. Propene is stabilsed by no bond resonance

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Q. Assertion :Propyne is more reactive than propene towards electrophilic addition of

H B r

Reason: Propyne has greator electron density avaliable for electrophile due to two pi-bonds, therefore more electrophilic

Q. Assertion :Phenol is more reactive than benzene towards electrophilic substitution reaction. Reason: In case of phenol, the intermediate carbocation is more resonance stabilised

Q. Statement-I : Propene is more reactive than ethene with HCl.
Statement-II : Propene is more stable than ethene.

Q. Assertion :Propene is more reactive than propyne towards addition of

B r_{2}

Reason: Propyne forms a less stable cyclic bromonium ion than propene.

1^{o}

allylic halides are more reactive than

1^{o} R X

S_{N} 1

reaction
Reason: Allylic carbocation intermediate is stabilised by resonance

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Nucleophilic Substitution in Aryl Halides

Standard XII Chemistry

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