Which of the following molecules will have smallest bond length?

H-Br

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H-Cl

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H-F bond

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H-I

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Solution

The correct option is C
H-F bond

One of the factors affecting bond length is size of atoms.

Bond length increases with increase in size of atoms.

Since size of F is smallest out of Cl, Br and I, H-F bond will have smallest bond length.

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