Q13 / 90 · JEE Main 2019 (08 Apr Shift 2) · Chemistry

The statement that is INCORRECT about the interstitial compounds is:

  • A
    They have high melting points.
  • B
    They are very hard.
  • Correct answer
    C
    They are chemically reactive.
  • D
    They have metallic conductivity.

Solution

The principal physical and chemical characteristics of interstitial compounds are as follows:

(i) They have high melting points, higher than those of pure metals.

(ii) They are very hard, some borides approach diamond in hardness.

(iii) They retain metallic conductivity.

(iv) They are chemically inert.

Hence, the correct answer is option: 'C'.

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