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Glass can be made opaque by grinding the surface of the glass with _________

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in Construction & Building Materials by (189k points)
Glass can be made opaque by grinding the surface of the glass with _________

(a) Mortar

(b) Flint

(c) Alcohol

(d) Emery

This question was addressed to me in an interview for job.

My question is from Glass topic in chapter Glass, Lime, Clay Products & Bricks of Construction & Building Materials

1 Answer

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Best answer
Right choice is (d) Emery

The best explanation: Glass can be made opaque by grinding the surface of the glass with emery. It can also be done chemically by applying hydrochloric acid.

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