Question

which of the following statement is / are correct ?
A. the pH of `1.0xx10^(-8)` M solution of HCl is 8.
B. the cnjugate base of `H_(2)PO_(4)^(-)` is `HPO_(4)^(2-)`
C. Autoprotolysis constant of water decreases with temperature
D. when a solution of a weak monoprotic acid is titrated against a strong base , at half - neutralization point `pH= (1//2)pk_(a)`

Answer 1

Correct Answer - B
`H_(2)PO_(4)^(-)hArr H^(+)+HPO_(4)^(-2)`