MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryGOCPrevious Year Questions

For (i) I–, (ii) Cl–, (iii) Br–, the increasing order of nucleophilicity would be (AIPMT 2007)

A.Cl– < Br– < I–✓ Correct

B.I– < Cl– < Br–

C.Br– < Cl– < I–

D.I– < Br– < Cl–

Explanation

In case of different nucleophiles, but present in the same group in the periodic table, then larger is the atomic mass, higher is the nucleophilicity. Hence, the increasing order of nucleophilicity of the halide ions is F– < Cl– < Br– < I–.

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