Which one among the following statements is not true for glass?
- A. Sodium silicate is known as water glass.
- B. Glass is also called super cooled liquid.
- C. Crystallinity develops on cooling of the molten mass of the glass. ✓
- D. Coloured glasses can be made by adding different colouring materials.
Correct Answer: C. Crystallinity develops on cooling of the molten mass of the glass.
Explanation
Glass is an amorphous solid (supercooled liquid) and does not develop a crystalline structure upon cooling[cite: 1].
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