Question

Which of the following is an interstitial compound?

• A. \( \text{SC}_2\text{O}_3 \)
• B. \( \text{Mn}_4\text{N} \)
• C. \( \text{TiCl}_4 \)
• D. \( \text{TiN} \)

Hint:

Interstitial compounds are formed when small atoms fit into the voids of a larger metal or metal-like structure, and they often have enhanced physical properties such as hardness and electrical conductivity.

Answer 1

The Correct Option is D

An interstitial compound is a compound in which small atoms, such as hydrogen, carbon, or nitrogen, occupy the interstitial spaces (voids) between the atoms of a host metal. These compounds exhibit unique properties, such as hardness and electrical conductivity, because of the small atoms filling the gaps in the lattice structure. 
Among the given options: 
- \( \text{SC}_2\text{O}_3 \) is not an interstitial compound. 
- \( \text{Mn}_4\text{N} \) is a compound of manganese and nitrogen, but not an interstitial compound. 
- \( \text{TiCl}_4 \) is titanium tetrachloride, a molecular compound, not an interstitial compound. 
- \( \text{TiN} \), titanium nitride, is an interstitial compound where nitrogen atoms occupy the interstitial spaces in the titanium lattice. 
Thus, the correct answer is \( D \).