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About 95% of the earth's crust is compos...

About `95%` of the earth's crust is composed of silicate minerals, alumino silicate clay r silica. Silicates are classified on the basis of bonding and the metal ions present in them. Some of the common categories of silicates are
(I) orthosilicates , (II) pyrosilicates
(III) cyclic silicates , (IV) chain silicates
(V) amphiboles , (VI) sheet silicates
(VII) three-dimensional network silicates
Which is incorrect regarding three dimensional netwirk silicates ?

A

It is pure `SiO_(2)`

B

It has all four oxygen of tetrahedron shared

C

Feldspars, zeolites and ultramarines are the common examples

D

It contains some isomorphously substituted `Al^(3+)` ion

Text Solution

Verified by Experts

The correct Answer is:
A
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About 95% of the earth's crust is composed of silicate minerals, alumino silicate clay r silica. Silicates are classified on the basis of bonding and the metal ions present in them. Some of the common categories of silicates are (I) orthosilicates , (II) pyrosilicates (III) cyclic silicates , (IV) chain silicates (V) amphiboles , (VI) sheet silicates (VII) three-dimensional network silicates What is true regarding a double chain silicate 'Amphiboles' ?

About 95% of the earth's crust is composed of silicate minerals, alumino silicate clay r silica. Silicates are classified on the basis of bonding and the metal ions present in them. Some of the common categories of silicates are (I) orthosilicates , (II) pyrosilicates (III) cyclic silicates , (IV) chain silicates (V) amphiboles , (VI) sheet silicates (VII) three-dimensional network silicates Which of the following is not true regarding cyclic silicates ?

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