UPSC CDS II 2024 GK Paper

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Question : 18 of 120

Marks: +1, -0

Which one among the following statements is not true for glass?

Sodium silicate is known as water glass.
Glass is also called super cooled liquid.
Crystallinity develops on cooling of the molten mass of the glass.
Coloured glasses can be made by adding different colouring materials.

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