[They are used as cation e...] Which of the following statement about the zeolites is false?

For Competitive Exams

Which of the following statement about the zeolites is false?

They have open structure which enables them to take up small molecules.

Zeolites are aluminosilicates having three dimensional network.

Some of the SiO–4
4 units are replaced by AlO–5
4 and AlO–9
6 ion in zeolites.

They are used as cation exchangers

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