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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS
1
Medium
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Analyzing
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Assertion: Actinoids show more variety in oxidation state than lanthanoids.
Reason: Actinoids have comparatively larger size than lanthanoids.
Reason: Actinoids have comparatively larger size than lanthanoids.
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Correct option: B
Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
Option B (Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion) is correct because while both statements are true, the larger size of actinoids is not the direct cause of their more varied oxidation states. The availability of 5f, 6d, and 7s electrons for bonding is the primary reason.
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