CGPET 2018 Solved Paper

[Ni(CN)4]2−∵ Has square planar geometry with no unpaired electron.
∴ Has zero dipole -moment.
2. cis [Pt(NH3)2Cl2]
Structure of cis [Pt(NH3)2Cl2]∴ Both NH3 and Cl ligands are in the same plane as shown in the structure. Thus, they give cis - [Pt(NH3)2Cl2] and show a net dipole moment.
3. trans [Pt(NH3)2Cl2] due to presence of Cl and NH3 ligands, the compound is stable but in the case, pair of both the ligands (i.e. NH3 and Cl ) are in the opposite plane and direction, thus net dipole moment becomes zero.4. As structure of [Ag(CN)2] is linear, in which two − CN groups are present on the opposite side of the central atom silver (Ag). Hence, show zero dipole moment.
∴ Hence, (d) is the correct answer.