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CSS Organic and Environmental Chemistry P-II QUESTION #1437
Question 1
The raw materials for glass manufacturing typically include:
  • Limestone and sand
  • Sand, soda ash, and lime✔️
  • Clay and sodium hydroxide
  • None of these
Correct Answer Explanation
Standard soda-lime glass (the most common type) is manufactured from three primary raw materials: silica sand (\(\text{SiO}_2\)), soda ash (sodium carbonate, \(\text{Na}_2\text{CO}_3\)), and limestone/lime (\(\text{CaCO}_3\)/\(\text{CaO}\)). The soda ash lowers the melting point, while lime improves chemical durability. The mixture is melted at about 1500°C.