Q. Exhausted permutit does not contain …….ion.
A) $Na^{+}$
B) ${Mg}^{2 +}$
C) ${Al}^{3 +}$
D) ${Si}^{4 +}$
Explanation
(a)
Permutit or zeolite is the aluminosilicate of sodium. It is used to remove hardness of water. It converts insoluble salts of $Ca^{2 +}$ and $Mg^{2 +}$ into soluble zeolites. It exchange these ions with $Na^{+}$ and water becomes soft.
Thus, exhausted permutit does not contain $Na^{+}$ ions.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.