MHT CET Chemistry question

The second ionisation enthalpy of the alkaline earth metals are smaller than that of corresponding group I metals. This is due to

(A)large size of alkali metals
(B)stable configuration of alkali metal ionsCorrect
(C)small size of alkaline earth metals
(D)stable configuration of alkaline earth metal monocation

Answer: (B)

Solution

The ion of an alkali metal has a stable noble gas configuration, so removing a second electron is very difficult, whereas of an alkaline earth metal has an

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Question ID VK-067188