Which of the following statements is incorrec | vedclass

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(D) Zeolites are microporous,crystalline solids with a well-defined structure. They consist of $Si$,$Al$,and $O$ atoms. In their structure,some $Si^{4

Vedclass · Accepted Answer

In zeolites,the $SiO_4^{4-}$ unit is replaced by $AlO_4^{5-}$ and $AlO_6^{9-}$ ions.

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(D) Zeolites are microporous,crystalline solids with a well-defined structure. They consist of $Si$,$Al$,and $O$ atoms. In their structure,some $Si^{4+}$ ions are replaced by $Al^{3+}$ ions,which creates a negative charge on the framework. This negative charge is balanced by cations like $Na^+$,$K^+$,or $Ca^{2+}$. The statement that $SiO_4^{4-}$ is replaced by $AlO_4^{5-}$ and $AlO_6^{9-}$ is incorrect because the framework is based on $AlO_4$ tetrahedra,not $AlO_6$ octahedra.

Which of the following statements is incorrect regarding zeolites?

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