Question

What is the coordination number of cation in ionic compound if the type of hole occupied by cation is cubic?

• A. 3
• B. 4
• C. 8
• D. 6

Hint:

When a cation occupies a cubic hole in an ionic lattice, the coordination number is 8.

Answer 1

The Correct Option is C

Step 1: Understanding coordination number and cubic holes.
In ionic compounds, the coordination number refers to the number of ions or atoms surrounding a central ion in the lattice structure. When a cation occupies a cubic hole in the lattice, the coordination number is 8.

Step 2: Analyzing the options.
(A) 3: This is the coordination number for a trigonal planar geometry, not cubic.
(B) 4: This is the coordination number for a tetrahedral hole, not cubic.
(C) 8: Correct — The coordination number for a cation in a cubic hole is 8.
(D) 6: This is the coordination number for an octahedral geometry, not cubic.

Step 3: Conclusion.
The correct answer is (C) 8.