JEE Main · 12 April 2019, Shift 1 · Q46

The basic structural unit of feldspar, zeolites, mica, and asbestos is:

1

$\displaystyle \mathrm{SiO}_2$

2

3

$\displaystyle \left(\mathrm{SiO}_3\right)^{2-}$

4

$\displaystyle \left(\mathrm{SiO}_4\right)^{4-}$

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