JEE Main Chemistry question

Which is correct about ionisation potential? [MHT-CET 2003]

(A)It is independent of atomic radii
(B)It increases with increase in atomic radii
(C)It remains constant with increase in atomic radii
(D)It decreases with increase in atomic radiiCorrect

Answer: (D)

Solution

As atomic radius increases (e.g. down a group), the outermost electron lies farther from the nucleus and is held less tightly, so it requires less energy to remove — ionisation

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Question ID VK-133168