Ans : option c
How? Please explain each and every point.:
13. Carefully read the following four statements related to Slater's rule and identify them as True (T) or False (F).
I - Zeff value for the valence s-electron increases more rapidly, in moving left to right in a period, in 's' and 'p' block elements compared to d-block elements.
II - Zeff value for the outermost s-orbital of f-block elements, becomes constant irrespective of the number of (n-2)f - electrons and this contradicts f- contraction. This fact can be said to be a drawback of Slater's rule.
III -The Slater's rule does not take into account, the relative penetrating power of s and p-orbitals.
IV - In general, for the d-block elements of 3d-series, the value of Zeff increases by 0.65 unit per element.
(A) TFTF (B) TFFF (C) TTTF (D) FTTF
