Q22 / 90 · KVPY 2016 (SB/SX) · Chemistry

A unit cell of calcium fluoride has four calcium ions. The number of fluoride ions in the unit cell is

  • A
    2
  • B
    4
  • C
    6
  • Correct answer
    D
    8

Solution

No. of $F^{-}$will be equal to eight since for one $\mathrm{Ca}^{+2}$ there should be two $\mathrm{F}^{-}$ion.

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

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