Which of the following statements about the zeolites is false?

Options

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

Answer

B

Explanation

Zeolite have `SiO_(4)` and `AlO_(4)` tetrahedrons 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.