Question

Statement `H_(3)PO_(3)` is a dibasic acid and its salt `Na_(2)PO_(3)` does not exist.
Explanation Being dibasic nature, only two `H` are replaceable.
A. `S` is correct but `E` is wrong.
B. `S` is wrong but `E` is wrong.
C. Both `S` and `E` are correct and `E` is correct explanation of `S`.
D. Both `S` and `E` are correct but `E` is not correct explanation of `S.

Answer 1

Correct Answer - C
`HO-underset(O)underset(||)overset(H)overset(|)P-OH` , thus only `Na_(2)HPO_(3)` and `NaH_(2)PO_(3)` salts are possible.