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Question
Ionic radii vary in
(i) inverse proportion to the effective nuclear charge.
(ii) inverse proportion to the square of effective nuclear charge.
(iii) direct proportion to the screening effect.
(iv) direct proportion to the square of screening effect.
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Solution
(i) inverse proportion to the effective nuclear charge.
(iii) direct proportion to the screening effect.
Explanation:
Ionic radii decreases with the increase of the effective nuclear charge and increases with the increase of shielding effect or \[\ce{e- - e-}\] repulsion as it outweighs the effective nuclear charge effect.
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