1.

In the following groups: -OA c (I),-Ome (II)-OSO_(2)(Me(III),-OSO_(2)CF_(3)(IV) the order of leaving group ability is

Answer»

IgtIIgtIIIgtIV
IVgtIIIgtIgtII
IIIgtIIgtIgtIV
IIgtIIIgtIVgtI

Solution :Weaker the base better is the leaving group. Now acidity DECREASES in the order: `CF_(3)SO_(2)OH gt MeSO_(2)OH gt AcOH gt MeOH,` therefore, basicity of their conjugate BASES increases in the reverse direction, i.e., `CF_(3)SO_(2)O^(-)(IV) lt MeSO_(2)O^(-) (III) lt AcO^(-)(I) lt MeO^(-)(II)`. thus, the CORRECT order is: IVgtIIIgtIgtII, i.e., option (b) is correct.


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