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  • Which of the following statements about the interstitial compounds is incorrect?Option: 1 They have higher melting points than

Which of the following statements about the interstitial compounds is incorrect?

Option: 1

They have higher melting points than pure metal.


Option: 2

They retain metallic conductivity.


Option: 3

They are chemically reactive.


Option: 4

They are much harder than the pure metal.


Answers (1)

best_answer

Formation of Interstitial Compounds -

Interstitial compounds are those which are formed when small atoms like H, C, or N are trapped inside the crystal lattices of metals. They are usually nonstoichiometric and are neither typically ionic nor covalent, for example, TiC, Mn4N, Fe3H, VH0.56, and TiH1.7, etc. The formulas quoted do not, of course, correspond to any normal oxidation state of the metal. Because of the nature of their composition, these compounds are referred to as interstitial compounds. The principal physical and chemical characteristics of these compounds are as follows:
(i) They have high melting points, higher than those of pure metals.
(ii) They are very hard, some borides approach diamonds in hardness.
(iii) They retain metallic conductivity.
(iv) They are chemically inert.

-

Interstitial compounds are chemically unreactive, much harder than pure metal, they have a higher melting point than pure metal, and retain metallic conductivity.

Therefore, Option(3) is correct.

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Rishi

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