[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.