Which of the following substances would you expect to possess metallic properties: (a) \(\mathrm{TiCl}_{4}\), (b) NiCo alloy, (c) \(\mathrm{W},(\mathrm{d})\) Ge, (e) \(\mathrm{ScN}\) ?

We have the following substances: (a) \(\mathrm{TiCl}_{4}\) (b) NiCo alloy (c) \(\mathrm{W}\) (d) Ge (e) \(\mathrm{ScN}\)

(a) \(\mathrm{TiCl}_{4}\): This is a molecular compound formed by the combination of titanium (Ti, a metal) and chlorine (Cl, a non-metal). Since it is a compound and not a pure metal, it is not likely to possess metallic properties. (b) NiCo alloy: This is an alloy formed by combining nickel (Ni) and cobalt (Co), both of which are metallic elements. Since alloys typically retain the metallic properties of their constituent elements, we can expect NiCo alloy to possess metallic properties. (c) \(\mathrm{W}\): This is tungsten (W), a pure metal. As a metal element, it possesses metallic properties. (d) Ge: This is germanium (Ge), a metalloid. Metalloids have properties that are intermediate between those of metals and non-metals, and while they may possess some metallic properties, they generally lack the full range of metallic attributes. (e) \(\mathrm{ScN}\): This is a molecular compound formed by the combination of scandium (Sc, a metal) and nitrogen (N, a non-metal). Similar to \(\mathrm{TiCl}_{4}\), it is not likely to possess metallic properties since it is a compound and not a pure metal.

Based on our analysis, the following substances possess metallic properties: (b) NiCo alloy (c) \(\mathrm{W}\) In conclusion, substances (b) NiCo alloy and (c) \(\mathrm{W}\) are expected to possess metallic properties, while the other options do not have the typical metallic attributes.