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Glass can be made opaque by grinding the surface of the glass with _________(a) Mortar(b) Flint(c) Alcohol(d) EmeryThis 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

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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