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Which one of the following is not used as a raw material in the manufacture of glass?

Options

  1. ASoda
  2. BAlumina
  3. CBorax
  4. DGypsum

Correct answer

D. Gypsum

Step-by-step solution

- Glass is made from natural and abundant raw materials (sand, soda ash and limestone) that are melted at very high temperature to form a new material glass - Alumina is often used in the production of glass products, lending improved strength; it has even been studied for its potential in creating an unbreakable glass - In the glass and textile fiberglass manufacturing process, boric oxide functions as both a flux and network former. It significantly lowers melting temperature and inhibits crystallization of the g

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