Match the items given in List-I with items given in List-II

Choose the correct answer from the options given below:

(A)-(II), (B)-(IV), (C)-(I), (D)-(III)

The correct answer is Option (3) → (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

(A) Interstitial Compounds $\rightarrow$ (II) Chemically inert

• Interstitial compounds are generally chemically inert and very hard due to the small atoms (like H, C, or N) occupying the interstitial sites in the metal lattice, making the structure more rigid and stable.

(B) Alloy formation $\rightarrow$ (IV) Blend of different metals

• An alloy is a substance with metallic properties that is formed by mixing two or more elements, at least one of which is a metal; thus, it is a blend of different metals (or a metal and a non-metal).

(C) Transition metals $\rightarrow$ (I) Large number of complex

• Transition metals are known to form a large number of complexes (coordination compounds) due to their small size, high ionic charge, and the availability of vacant $d$ orbitals to accept electron pairs from ligands.

(D) Catalytic hydrogenation $\rightarrow$ (III) Ni

Nickel ($\text{Ni}$) is a very common catalyst used in catalytic hydrogenation reactions, such as the hydrogenation of vegetable oils (synthesis of vanaspati ghee).