JEE Main · 2018 · 08 Apr 2018 · Offline · Equilibrium

Which of the following salts is the most basic in aqueous solution?

(A) $Pb (CH_{3} COO)_{2}$
(B) $Al (CN)_{3}$
(C) $CH_{3} COOK$ ✓ Correct
(D) $FeCl_{3}$

Answer: (C)

Solution

A salt is basic in water when it comes from a strong base and a weak acid, so that its anion hydrolyses to release

OH X^{-}

. Lead acetate pairs a weak base with a weak acid, iron(III) chloride is the salt of a strong acid and so is acidic, and aluminium cyanide pairs two weak partners, while only potassium acetate, from strong

KOH

and weak

CH X_{3} COOH

, hydrolyses to give a clearly basic solution, making it the most basic of the set.

JEE Main · 2018 · 08 Apr 2018 · Offline · Single correct option

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