Home Chemistry Solid State General A crystal of KCl containing a small amount o…
Chemistry Solid State General Single Correct MCQ
Published on: August 12, 2026

A crystal of KCl containing a small amount of CaCl 2 will have

A
vacant Cl – sites
B
vacant K + sites and a higher density as compared to pure KCl
C
vacant K + sites and a lower density as compared to pure KCl
D
K + ions in the interstitial sites

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The correct answer is:
C

In the crystallization, some K + ions will get replaced by as many half of Cd 2+ ions. Thus the cation vacancies will be the same as the number of Cd 2+ is ions incorporated. So crystal have vacant K + sites and a lower density as compared to pure KCl.

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