JEE Main Chemistry question

Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group? [DCE 2003]

(A)Nuclear charge and electron affinity
(B)Ionisation radius and electron affinity
(C)Atomic radius and electron affinityCorrect
(D)None of the above

Answer: (C)

Solution

Atomic radius decreases across a period but increases down a group, while electron affinity (magnitude) increases across a period but decreases down a group — these two properties move in exactly opposite directions to each other along both axes. Nuclear charge and

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Question ID VK-133180