Which of the following defects is present in KCl crystals ?

Which of the following defects, if present, lowers the density of the crystal ?

Which of the following defects, if present, lowers the density of the crystal ?

Which of the following defects in a non-ionic crystal causes increase or decrease in density of the crystal? (1) Vacancy defect (2) Interstital defect.

Which one of the following defects in the crystals lowers its density?

Which one of the following defects in the crystals lower its density ?

Which of the following statements regarding crystal defects is not correct?

Which of the following defects decreases the density of the crystal?

Which type of defects are present in AgBr and ZnS crystal systems?