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Oxyacids of Phosphorus

Two tautomeri...

Question

Two tautomeric forms of phosphorus acid are:

A

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B

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C

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D

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Solution

The correct option is B
Phosphorus acid is a diprotic acid which exists in two forms:the major form is of $H P O (O H)_{2}$ species in equilibrium with a minor tautomer of $P (O H)_{3}$ .

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