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MHT CET202519 Apr 2025Evening ShiftChemistrySolid StateActual

Which of the following statements is NOT correct regarding voids in lattice structure?

Options

  1. AFour spheres are involved in the formation of a tetrahedral void.
  2. BThe octahedral void is surrounded by six spheres.
  3. CThere are two tetrahedral voids associated with each atom.
  4. DThere is one octahedral void associated with two atoms.

Correct answer

D. There is one octahedral void associated with two atoms.

Step-by-step solution

Incorrect Statement About Voids in Crystal Lattices A tetrahedral void is formed when four spheres touch each other. An octahedral void is formed when six spheres surround an empty space. In close-packed structures (hcp/ccp), the number of tetrahedral voids = 2 × number of atoms. The number of octahedral voids = number of atoms (1 per atom). Therefore, the statement “There is one octahedral void associated with two atoms” is incorrect.

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