Question

A salt X is dissolved in water having pH =7. The resulting solution has a pH more than 7. The salt is made by neutralisation of

• A. A strong acid and strong base
• B. A strong acid and weak base
• C. A weak acid and weak base
• D. A weak acid and strong base

Answer 1

Answer: (D)

A weak acid and strong base

Answer 2

$pH \,> 7$ implies the solution is basic. Since salt on hydrolysis in water gives basic solution. Therefore, it is a salt of weak acid strong base and undergoes anionic hydrolysis in aqueous solution $A^{-} +HOH {<=>} HA+OH^{-}$