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Which of the following is used to prepare soluble glass?

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Which of the following is used to prepare soluble glass?

(a) Caustic soda

(b) Magnesia

(c) Lead dioxide

(d) Quartz sand

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Right choice is (d) Quartz sand

To elaborate: To prepare soluble glass, quartz sand is melted and then it is grinded and thoroughly mixed with soda ash, potassium carbonate or sodium sulphate. This type of glass is used to prepare acid-resistant cement.

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