Which of the following has strongest hydrogen bonding?

O - H . . . N

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O - H . . . O

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F - H . . . F

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O - H . . . F

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Solution

The correct option is B $F - H . . . F$

Greater the difference between electro-negativity of bonded atoms, stronger will be the bond.

Since fluorine is most electronegative, hence $F - H . . . F$ has the strongest hydrogen bonding.

Therefore, the correct option is C.

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