Chemistry

Problem

The pairs of compounds which cannot exist together in aqueous solution are : (I)

\text{NaH}_2\text{PO}_4

and

\text{Na}_2\text{HCO}_3

(II)

\text{Na}_2\text{CO}_3

and

\text{NaHCO}_3

(III)

\text{NaOH}

and

\text{NaH}_2\text{PO}_4

(IV)

\text{NaHCO}_3

and

\text{NaOH}

a. I, II, III b. III, IV c. I, IV d. II, III