Assertion : Zeolites are the three-dimensional network silicates.
Reason: Negative charge on zeolite structure is neutralised by positively charged $A l^{3 +}$ ions.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Zeolites are the three dimensional aluminosilicates in which few $S i$ atoms are replaced by $A l$ atoms.
The acquired negative charge on zeolite structure is balanced by cations such as $N a^{+}, K^{+} o r C a^{2 +}$ , etc

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Assertion : Zeolites are the three-dimensional network silicates.Reason: Negative charge on zeolite structure is neutralised by positively charged Al3+ ions.

The correct option is C Assertion is correct but Reason is incorrect.Zeolites are the three dimensional aluminosilicates in which few Si atoms are replaced by Al atoms. The acquired negative charge on zeolite structure is balanced by cations such as Na+,K+orCa2+, etc

Assertion : Zeolites are the three-dimensional network silicates.
Reason: Negative charge on zeolite structure is neutralised by positively charged $A l^{3 +}$ ions.

The correct option is C Assertion is correct but Reason is incorrect.
Zeolites are the three dimensional aluminosilicates in which few $S i$ atoms are replaced by $A l$ atoms.
The acquired negative charge on zeolite structure is balanced by cations such as $N a^{+}, K^{+} o r C a^{2 +}$ , etc