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SN1 reaction undergoes through a carbocation intermediate as follows: (X = Cl, Br, I) The correct statements are: I. The decreasing order of rate of SN1reaction is t-BuX > iso-PrX > EtX > MeX II. The decreasing order of ionization energy is MeX > EtX > iso-PrX > t-BuX III. The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX

SN1 reaction undergoes through a carbocation intermediate as follows: (X = Cl, Br, I) The correct statements are: I. The decreasing order of rate of SN1reaction is t-BuX > iso-PrX > EtX > MeX II. The decreasing order of ionization energy is MeX > EtX > iso-PrX > t-BuX III. The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX Correct Answer (X = Cl, Br, I) The correct statements are: I. The decreasing order of rate of SN1reaction is t-BuX > iso-PrX > EtX > MeX II. The decreasing order of ionization energy is MeX > EtX > iso-PrX > t-BuX III. The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX ] I & II are correct

(1) Formation of carbocation is RDS, more stable the cation more easily it will form. Hence rate order is t-BuX > iso-PrX > EtX > MeX (2) Formation of carbocation CH3 is most difficult hence ionization energy is highest. Similarly, EtX has lesser ionization energy than MeX and so on. (3) Order of energy of activation is MeX > EtX > iso-PrX > t-BuX.

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