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.

Vedclass · Answer

(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.

List-$I$	List-$II$
$A$. Coke	$I$. Carbon atoms are $sp^3$ hybridised
$B$. Diamond	$II$. Used as a dry lubricant
$C$. Fullerene	$III$. Used as a reducing agent
$D$. Graphite	$IV$. Cage like molecules

Which of the following statements is incorrect regarding zeolites?

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List-$I$ List-$II$

$A$. Coke $I$. Carbon atoms are $sp^3$ hybridised

$B$. Diamond $II$. Used as a dry lubricant

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$D$. Graphite $IV$. Cage like molecules

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