Statement (I) `Co^(2+)` has higher magnetic moment than `Cr^(3+)`
Statement (II) Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa, U
Which of the following is correct ?

Options

A. Both (I) and (II) are not correct
B. Both (I) and (II) are correct
C. (I) is correct but (II) is not correct
D. (I) is not correct but (II) is correct

Answer

D

Explanation

`mu = sqrt(n(n +2))n = 3 sqr15 = 3.95 B.M`

`mu = sqrt(n(n + 2)) = sqrt24 = 4.95B.M`
Statement (I) is not correct as magnetic moment of `Cr^(3+)` is more than of `CO^(2+)`. But, statement (II) is correct, as I.P. of Ce. Pt and Nd are higher than th, Pa and U. Thus, the correct option is (d).