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AIIMS 2007
Exam
AIIMS
Year
2007
Subject
Chemistry
Chapter
d and f Block Elements

AIIMS 2007 · Chemistry · d and f Block Elements

Assertion : Magnetic moment of Dy is the highest among the...

Assertion : Magnetic moment of Dy is the highest among the lanthanoids. Reason : Orbital motion contributes magnetic moment.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

4f4 f electrons are well screened thus their spins and their orbital motions about their nuclei contribute to the magnetic moment. Hence, even Dy has highest magnetic moment.
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