If 0.1 mole `H_(3)PO_(x)` is completely neutralised by 5.6g KOH then select the true statement.

Options

A. `x = 3` and given acid is dibasic
B. `x = 4` and given acid has no P-H linkage
C. `x = 2` and given acid does not form acid salt
D. `x = 4` and given acid has P-H linkage

Answer

C

Explanation

No. of equivalents of `H_(3)PO_(x) =` No. of equivalents of `KOH`
`n xx 0.2 = (56)/(56) rArr n = 1`
`:. H_(3)PO_(x)` is a monobasic acid. It is `H_(3)PO_(2)`
`x = 2` and the acid does not form acidic salt