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Chapter 9: Problem 14
Fill in the blanks. The type of glass which consists of a layer of plastic embedded in between two layers of glass is called ________.
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State whether the following statements are true or false. Impervious nature of ceramics is the effect of glazing.
State whether the following statements are true or false. Fullerene molecules are synthesized by subliming coal using laser radiation.
Noble metals get dissolved in aqua regia, the composition of aqua regia is (a) \(3 \mathrm{HCl}+\mathrm{HNO}_{3}\) (b) \(3 \mathrm{HNO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4}\) (c) \(\mathrm{HCl}+3 \mathrm{HNO}_{3}\) (d) \(\mathrm{HNO}_{3}+3 \mathrm{H}_{2} \mathrm{SO}_{4}\)
Which of the following gases with a smell of rotten egg is evolved when sulphuric acid is treated with copper sulphide? (a) sulphur vapour (b) sulphur dioxide (c) hydrogen sulphide (d) sulphur trioxide
Which property is imparted to glass by the addition of cerium oxide? (a) colour (b) resistance to breakage (c) increase of refractive index (d) protection from UV light
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