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  4. 95 % of earth crust is made up of silica and silicates. Silicon dioxide, commonly known as

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Q. $95 \%$ of earth crust is made up of silica and silicates. Silicon dioxide, commonly known as

The p-Block Elements

Solution:

Silica $\left( SiO _{2}\right)$ is a major constituent present in earth crust and it occurs in many crystallographic forms such as quartz, cristobalite, tridymite etc.