The true statement of the acids of phosphorus `H_3 PO_2, H_3 PO_2` and `H_3 PO_4` is

Options

A. The order of their acidity is `H_3PO_4 gt H_3PO_3 gt H_3PO_2`
B. All the them are reducing in nature
C. All of them are tribasic acids
D. The geometry of phosphorus is tetrahedral in all the three.

Answer

D

Explanation

`H_3PO_2. H_3PO_3 " and " H_3PO_4` contain one, two and three ionsiable hydrogen atoms respectively.
`H_3PO_2 iff H^(+) + H_2PO_2^(-)`
`H_3PO_3 iff H^(+) + H_2PO_3^(-) iff 2H^(+) + HPO_3^(2-)`
`H_3PO_3 iff H^(+) + H_2PO_3^(-1) iff 2H^(+) + HPO_4^(2-) iff 3H^(+) + PO_4^(3-)`
But there is very little difference in acidity.

As `sp^3` hybridised, therefore all are tetrahedral.