Question

A solid XY crystallizes in NaCl type structure (X is cation). Some
atoms are removed such that crystal remain neutral. The possible
case is​

Answer 1

Answer:

This could be schottky defect

In Schottky defect equal number of cations and anions are missing, it decreases the density of the substance but never changes its neutrality

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Answer 2

The possible  case is of​ Schottky Defect.

- In Schottky defect, there is a vacancy of equal no of cations and anions from the crystal lattice.

- Since equal no of cations and anions are absent from the crystal, it remains neutral.

- NaCl also shows the same type of defect.

- This is the same case as given in the question for the solid XY.

- Hence, this case is most probably of Schottky defect.