(A) `Cr^(+3)` and `Co^(2+)` ions have same number of unpaired electrons but the observed magnetic moment of `Cr^(3+)` is 3.87 B. M and that of `Co^(2+)` is 4.87 B.M
(R) Due to symmetrica electronic configuration there is no orbital motion of unpaired electron in `Cr^(3+)` ion while appreciable orbital contribution takes place in `Co^(2+)` ion .

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. Both (A) and (R) are false

Answer

A

Explanation

Both (A) and (R) are true and (R) is the correct explanation of (A)