Q. Which one of the following statements about the zeolites is false?
A) They are used as cation exchangers.
B) They have open structure which enables them to take up small molecules.
C) Zeolites are aluminosilicates having three dimensional network.
D) Some of the $SiO_{4}^{4 -}$units are replaced by $AlO_{4}^{5 -}$and $AlO_{6}^{9 -}$ ions in zeolites.
Explanation
(d)
Zeolites are aluminosilicates having three dimensional open structure in which four or six membered rings predominates.
Thus, due to open chain structure, they have cavities and can take up water and other small molecules.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.