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Which of the following is a raw material for common glass?

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Which of the following is a raw material for common glass?

(a) Lead dioxide

(b) Potassium bicarbonate

(c) Salt cake

(d) Litharge

This question was addressed to me during an internship interview.

This intriguing question comes from Glass in portion Glass, Lime, Clay Products & Bricks of Construction & Building Materials

1 Answer

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The correct answer is:

(d) Litharge

Litharge (PbO) is used as a raw material in the production of glass, especially lead glass. It helps improve the clarity and refractive properties of the glass.

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