Assertion : Magnetic moment of `Mn^(2+)` is less than `Cr^(2+)` Reason: Higher the atomic number smaller is the magnetic moment.
Assertion : Magnetic moment of `Mn^(2+)` is less than `Cr^(2+)`
Reason: Higher the atomic number smaller is the magnetic moment.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true and reason not is the correct explanation of assertion.
C. If assertion is trun but reason is false.
D. If both assertion and reason are false.
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Correct Answer - D
The magnetic moment is determined by number of unp[aired electrons and is calcultated by using the formula, `mu =sqrt(n(n+2))` where n is number of unpaired electrons.
In increases with increase in number of unpaired electrons hence `Mn^(2+)` will have higher magnetic moment than `Cr^(2+)`.
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