Question

Raw materials used in the preparation of glass are:

• A. $Sand\left(Si{O}_2\right)$
• B. $Sodaash\left(N{a}_{2}C{O}_3\right)$
• C. $Limestone\left(CaC{O}_3\right)$
• D. $NaC{O}_2$

Answer 1

Answer: (A), (B), (C)

The correct options are
A $Sand\left(Si{O}_2\right)$
B $Sodaash\left(N{a}_{2}C{O}_3\right)$
C $Limestone\left(CaC{O}_3\right)$

Raw materials used in the manufacturing of glass are -
sand $\left({\mathrm{SiO}}_2\right)$, soda ash $\left({\mathrm{Na}}_2{\mathrm{CO}}_3\right)$, limestone $\left({\mathrm{CaCO}}_3\right)$ and a small quantity of magnesium oxide $\left(\mathrm{MgO}\right)$.

Small amount of cullet (broken glass pieces) is also added to reduce the melting temperature.