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Q.

Statement-I: Actinoid contraction is lesser than lanthanoid contraction
Statement-II: 4f electrons are poorer screens compared to 5f electrons

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a

Statement-I is false and statement-II is true

b

Both statement-I and statement-II are true.

c

Both statement-I and statement-II are false

d

Statement-I is true and statement-II is false

answer is D.

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Detailed Solution

Actinoid contraction is greater than that of lanthanoid contraction, shielding effect of 5f electrons is poorer than that of 4f electrons.

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