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B
Pyro silicates
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C
Chain silicates
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D
both a and c
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Solution
The correct option is A Cyclic silicates Cyclic silicates contain (SiO3)2n−n or (SiO2−3)n ions which are formed by linking three or more tetrahedral SiO4−4 units cyclically. Each unit shares two oxygen atoms with other units.
for example-