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Q.

Bond energy is least in the following

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An Intiative by Sri Chaitanya

a

HCI

b

HI

c

HBr

d

HF

answer is D.

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Detailed Solution

There is major thing is electronegative difference as we go down in group electronegativity decreases and bond between H--I has large difference in their size due to not good overlapping of orbitals this bond become weaker and easy to break .

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