MCQ
The basic structural unit of silicates is
- A$SiO_3^{2-}$
- B$SiO_4^{2-}$
- C$SiO^-$
- ✓$SiO_4^{-4}$

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$(A)\,ZnO + Na_2O\rightarrow Na_2ZnO_2$
$(B)\,ZnO + CO_2\rightarrow ZnCO_3$