Question

The metal purified by Mond process is X. The number of unpaired electrons in X is

• A. 5
• B. 4
• C. 3
• D. 2

Hint:

The Mond process involves forming a volatile compound of nickel—nickel tetracarbonyl—which decomposes to give pure nickel. Knowing the electron configuration helps determine unpaired electrons.

Answer 1

The Correct Option is D

Explanation:

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.

Final Answer:

2