H₂PO₄^- the conjugate base of _______.

(a)

PO₄³⁻

(b)

P₂O₅

(c)

H₃PO₄

(d)

HPO₄^2-

Which of the following can act as Lowery – Bronsted acid well as base?

(a)

HCl

(b)

SO₄²⁻

(c)

HPO₄²⁻

(d)

Br^-

The pH of an aqueous solution is Zero. The solution is _______.

(a)

slightly acidic

(b)

strongly acidic

(c)

neutral

(d)

basic

The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by _______.

(a)

\([{ H }^{ + }]=\frac { { K }_{ a }[acid] }{ [salt] } \)

(b)

\([{ H }^{ + }]={ K }_{ a }[salt]\)

(c)

\([{ H }^{ + }]={ K }_{ a }[acid]\)

(d)

\([{ H }^{ + }]=\frac { { K }_{ a }[salt] }{ [acid] } \)

Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

(a)

\(h=\sqrt { \frac { { K }_{ h } }{ C } } \)

(b)

\(h=\sqrt { \frac { { K }_{ a } }{ K_b } } \)

(c)

\(h=\sqrt { \frac { { K }_{ w } }{ { K }_{ a }.{ K }_{ b } } } \)

(d)

\(h=\sqrt { \frac { { { K }_{ a }.{ K }_{ b } } }{ { K }_{ w } } } \)