1.

Basic unit fo zeolite, mica, asbestos and feldpar is

Answer»

`(--overset(R)overset(|)underset(R)underset(|)Si-O--)_(n)(R=Me)`
`(SiO_(3))^(2-)`
`(SiO_(4))^(4-)`
`SiO_(2)`

Solution :`(SiO_(4))^(4-)`, orthosilicates


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