Q. Which of the following mineral does not contain Al?
A) Fluorspar
B) Cryolite
C) Mica
D) Feldspar
Explanation
(a)
Fluorspar $\left( CaF_{2} \right),$
Cryolite $\left( na_{3}AlF_{6} \right)$
Feldspar $(KAlSi_{3}O_{3})$,
Mica $(K_{2}O.3Al_{2}O_{3}.6SiO_{2}.2H_{2}O)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.