Which of the following orders is (are) correct for size:

Options

A. `AI ~~ Ga`
B. `Te^(2-) gt I^(-) gt Cs^(+) gt Ba^(2+)`
C. `Cr^(3+) lt Cr^(6+)`
D. `Pd ~~ Pt`

Answer

A, B, D

Explanation

(B) Isoelectronic series of ions, all have the xenon electron configuration.
Ionic radius `prop (1)/("nuclear charge")`
Atomic number : `Te = 52, I = 53, Cs = 55, Ba = 56`.
(D) Due to poor shielding of nuclear charge by `4f` electrons.