Which of the following statements about the zeolites is false?

Options

A. They are used as cation exchanger
B. They have open structure which enables them to take up small molecules
C. Zcolites are alumino silicates having three dimensional network
D. some of the `SiO_(4)^(4-)` units are replaced by `AIO_(5-)^(4)` and `AIO_(6)^(5-)` ions in zeolties

Answer

D