JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which metal does not form ionic hydride?

(A)Na
(B)Rb
(C)Ca
(D)BeCorrect

Answer: (D)

Solution

Na, Rb and Ca (A, B, C) are all electropositive enough to form true ionic (saline) hydrides containing discrete ions. Beryllium, being small and highly polarising like

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Question ID VK-137855