JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The alkali metals:

(A)Form salt like hydridesCorrect
(B)Form salts which are predominantly covalent
(C)Show decreased chemical reactivity with dry oxygen in going from Li to Cs
(D)Show increasing electronegativity from Li to Cs

Answer: (A)

Solution

Alkali metals form true ionic (salt-like) hydrides on direct combination with hydrogen, consistent with their highly electropositive nature (A, correct). Their salts are predominantly ionic, not covalent (ruling out B), their

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Question ID VK-137913