The correct statement regarding defects in crystalline solids is :

  • Option 1)

    Schottky defects have no effect on the density of crystalline solids.

  • Option 2)

    Frenkel defects decrease the density of crystalline solids.

  • Option 3)

    Frenkel defect is a dislocation defect.

  • Option 4)

    Frenkel defect is found in halides of alkaline.

 

Answers (1)

As we learnt in

Crystalline solid -

Solid in which constituent particles are arranged in a definite regular order upto infinite array in three dimension. It is anisotropic and have sharp melting point.

- wherein

Ex. NaCl, diamond

 

Frenkel defect is shown by ionic substances in which there is a large difference in the size of ions. Here, the smaller ion occupies an interstitial site creating a vacancy.

 


Option 1)

Schottky defects have no effect on the density of crystalline solids.

This solution is incorrect.

Option 2)

Frenkel defects decrease the density of crystalline solids.

This solution is incorrect.

Option 3)

Frenkel defect is a dislocation defect.

This solution is correct.

Option 4)

Frenkel defect is found in halides of alkaline.

This solution is incorrect.

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