Question

Which of the following is not an interstitial compound?
A. $ TiC $
B. $ VN $
C. $ VB $
D. $ SiC $

Answer 1

Hint: The elements in the d-block of the periodic table are known as transition metals. Cobalt, nickel, iron, and other transition metals are examples. Malleability, ductility, high tensile strength, and metallic lustre are common characteristics of transition metals.

Complete answer:
Compounds in which a smaller atom of one element is trapped in a space in the lattice structure of another element are known as interstitial compounds. Many interstitial regions in the structure of transition metals are known to trap tiny atoms such as hydrogen, nitrogen, boron, and carbon.
Among the given options, $ Ti $ and $ V $ are transition metals and the compounds they form are interstitial compounds. $ Si $ in $ SiC $ is not a transition metal.
Because of their closed structure with vacancies, transition metals are well known for forming interstitial compounds. Transition metals have huge spaces where small atoms are occupied due to their high atomic size.
Hence The correct option is D. $ SiC $

Additional Information:
1. Valency rules do not apply to interstitial compounds.
2. These compounds are very hard, metallic, and have very high boiling and melting points.
3. $ F{e_3}C $ is a steel interstitial compound that controls a variety of characteristics.
4. Interstitial compounds' hardness is utilised to harden alloys and high-speed cutting tool tips.
5. They are more reactive than the chemicals in general.
6. They maintain the conductivity of metals.

Note:
Intermetallic compounds, interstitial compounds, and electron compounds are the three most common interaction alloy phases. Intermetallic compounds are formed between chemically different metals, and electron compounds are formed in alloys of copper, gold, iron, and calcium, magnesium, and other metals.