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Which of the following does not exist ?...

Which of the following does not exist ?

A

`NaH_(2)PO_(2)`

B

`NaH_(3)P_(2)O_(7)`

C

`NaH_(2)PO_(3)`

D

`NaH_(3)PO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
`H_(4)P_(2)O_(7)` forms only two series of salts `H_(2)P_(4)O_(7)^(2-)` and `P_(4")O_(7)^(4-)` . For example `Na_(2)H_(2)P_(4)O_(7)` and `Na_(4)P_(4)O_(7)`
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