Q. Which of the following is not true about potash alum?
A) Its aqueous solution is basic
B) It is used in dyeing industries
C) On heating it melts in its water of crystallization
D) Its empirical formula is $KAl\left( SO_{4} \right)_{2} \bullet 12H_{2}O$
Explanation
The correct answer is Option D: Its empirical formula is $KAl\left( SO_{4} \right)_{2} \bullet 12H_{2}O$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.