JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which ion forms a hydroxide highly soluble in water?

(A)
(B)Correct
(C)
(D)

Answer: (B)

Solution

, and (A, C, D) are all sparingly soluble or amphoteric hydroxides of d-block/p-block metals. , being a group 1 alkali metal cation, forms KOH, which is

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Question ID VK-137783