Assertion: The spin only magnetic moment of `Sc^(3+)` is 1.73 BM.
Reason: The spin only magnetic momentum in (BM) is equal to `sqrt(n(n+2))`.

Options

A. If both assetion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

D

Explanation

Assertion: False, `Sc^(3+)` ion has unparied electron `(3 d^(@) 4 s^(@))` and thus has zero magnetic moment.
Reason: Magnetic moment is due to 'spin only' `= sqrt(n (n + 2)) B.M` value.n is number of upaired electrons (s).