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CBSE Class 12 · 2024 · d and f Block ElementsMultiple Choice

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Transition metals are known to form interstitial compounds. The formation of interstitial compounds makes the transition metal:
  1. (A)more hard✓ Correct
  2. (B)more ductile
  3. (C)more soft
  4. (D)more metallic

Answer: (A)

Solution

Small atoms (H, C, N) occupy the interstitial voids of the metal lattice, pinning the layers; the resulting interstitial compounds are harder and more rigid than the parent metal (also higher-melting, chemically inert), while malleability and ductility decrease.
Correct option: (A).

CBSE Class 12 Board · 2024 · Single correct option

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