The correct order of the calculated spin-only magnetic moments of complexs (A) to (D) is:
(A) Ni(CO)₄
(B) [Ni(H₂O)₆]Cl₂
(C) Na₂[Ni(CN)₄]
(D) PdCl₂(PPh₃)₂

Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x), (y) and (z), the sum of (x), (y) an (z) is :

The major product in the following reaction is:

Among (a) – (d) the complexes that can display geometrical isomerism are :
(a) [Pt(NH₃)₃Cl]⁺
(b) [Pt(NH₃)Cl₅]^–
(c) [Pt(NH₃)₂Cl(NO₂)]
(d) [Pt(NH₃)₄ClBr]²⁺