Q. Which of the following methods can’t be used to prepare anhydrous zinc chloride?
A) Passing dry chlorine over heated zinc
B) Passing dry hydrogen chloride over heated zinc
C) Heating the crystal of $ZnCl_{2} \bullet 2H_{2}O$
D) Distilling metallic zinc with mercury (II) chloride
Explanation
(c)
$ZnCl_{2} \bullet 2H_{2}O\overset{\rightarrow}{\ \ \ \ \mathrm{\Delta}\ \ \ }Zn(OH)Cl + HCl + H_{2}O$
$Zn(OH)Cl \rightarrow ZnO + HCl$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.