Which one of the following statements about the zeolite is false?

Options

A. They are used as cation exchangers
B. Some of the `SiO_4^4` units are replaced by `AlO_4^(-5) and AlO_6^(9-)` ions in zeolites
C. Zeolites are aluminusilicates having three - dimensional network
D. They have open structure which enables them to take up small molecules

Answer

B