JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The most electropositive element in alkali metals, is

(A)Na
(B)K
(C)Rb
(D)CsCorrect

Answer: (D)

Solution

Electropositive character (tendency to lose the valence electron) increases down a group as atomic size increases and ionisation enthalpy falls. Among Na, K, Rb and Cs, Cs has

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Question ID VK-137531