Which of the following statements about the zeolites is false?

Options

A. They are used as cation exchangers
B. Some of the `SiO_(4)^(4-)` units are replaced by `AIO_(4)^(5-)` and `AIO_(6)^(9-)` ions in zeolite.
C. They have open structure which enables them to take up small molecules.
D. Zeolites are aluminosilicates having three dimensional structures.

Answer

B

Explanation

Zeolites have `SiO_(4)` and `AIO_(4)~ tetrahdrons linked together in a three dimensional open structure in which four or six membered ring predominate. Due to open chain structure they have cavities and can take up water and other small molecules.