Q. In feldspar and zeolite, $Si^{4 +}$ ions are replaced by which ions?
A) Oxide ion
B) Hydroxide ion
C) Aluminium ion
D) Potassium ion
Explanation
(c)
Generally, the ion exchange tendency of a material depends on the extent of isomorphous substitution in the tetrahedral framework. Thus, the $Si^{4 +}$ ions of feldspar and zeolite are replaced by $Al^{3 +}$ (aluminium ion).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.