PYQ NEET- The F And D Block Elements

NEET 2018: Question 41:

The correct order of ionic radii of the following species is:

(A) [Fe(CN)6]^4- < [Fe(CN)6]^3- < [Fe(CN)6]^2- < [Fe(CN)6]^1-

The correct answer is (A).

The ionic radii of [Fe(CN)6]4-, [Fe(CN)6]3-, [Fe(CN)6]2- and [Fe(CN)6]^3- decrease in the order:

[Fe(CN)6]4- > [Fe(CN)6]3- > [Fe(CN)6]2- > [Fe(CN)6]^-

This is because the more the number of ligands, the greater the crystal field splitting, and the larger the ionic radius.

NEET 2017: Question 38:

Which of the following compounds is expected to be coloured?

(A) [Ti(H2O)6]3+ (B) [Ni(