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Bond Order and Enthalpy

The bond orde...

Question

The bond order of $X - O$ bond in $H P O_{3}^{2 -}$ and $C l O_{4}^{-}$ are respectively

1.25 a n d 1.75

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1.33 a n d 1.25

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1.33 a n d 1.33

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1.33 a n d 1.75

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Solution

The correct option is D $1.33 a n d 1.75$
Bond order = $\frac{Total number of bonds between two atoms in all the structures}{Total number of resonating structure}$
in $H P O_{3}^{2 -} = \frac{4}{3} = 1.33$
in $C l O_{4}^{-} = \frac{7}{4} = 1.75$

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