The Mond process is used to purify Nickel (Ni).
Nickel has atomic number 28.
The electronic configuration of Ni is:
\[ \text{Ni: } [\text{Ar}]\, 3d^8\, 4s^2 \]
In the ground state, the \(3d^8\) configuration has 2 unpaired electrons.
2

Match the following:
| List-I (reaction) | List-II (catalyst) |
|---|---|
| A) SO2(g) + Cl2(g) → SO2Cl2(l) | I) Pt / Rh gauge |
| B) 2SO2(g) + O2(g) → 2SO3(g) | IV) V2O5 |
| C) 4HCl + O2 → 2Cl2 + 2H2O | II) CuCl2 |
| D) 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) | III) Charcoal |