Which of the following will be the strongest bond?

F - O

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O - C l

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N - H

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O - H

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Solution

The correct option is D $O - H$
Bond strength is determined by the bond order
Bond strength $\propto$ Electronegativity difference
Let's see the EN difference one by one
$F - O$ = $0.5$
$O - C l$ = $0.5$
$N - H$ = $0.9$
$O - H$ = $1.4$
So as per the cocncept correct option is [D]

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The electronegativity of $O, F, N, C l$ and $H$ are $3.5, 4.0, 3.0, 3.0$ and $2.1$ respectively. The strongest bond will be

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(X = H, F or C l)

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