Question

Which of the following property about Interstitial compound is INCORRECT?

• A. They have high melting point, higher than those of pure metals.
• B. They retain metallic conductivity
• C. They are ionic in nature \& are soft.
• D. They are chemically inert.

Answer 1

The Correct Option is C

Concept:
Interstitial compounds are formed when small atoms (like H, B, C, N) occupy interstitial spaces in metal lattices. They are generally hard, have high melting points, and retain metallic properties. Step 1: Analyze each option. (A) True — They have high melting points.
(B) True — They retain metallic conductivity.
(C) False — They are not ionic and are very hard.
(D) True — They are chemically inert. Step 2: Identify incorrect statement. \[ \boxed{\text{Option (3) is incorrect}} \]