Q.

Among the following, relatively weak base is

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a

Cl-

b

F-

c

Br-

d

I-

answer is D.

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Detailed Solution

The weakest base, the base with the smallest base dissociation constant, Kb, will correspond to the strongest conjugate acid.

Weakest Base             Strongest conjugate acid

Conjugate Acidity to HI> HBr> HCl> HF

therefore, Weakest Base I-.

Hence, the correct option is option (D) I-.

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