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1) Constituents of an element can be separated through a. experiment b. physical processes c. physical method d. physical means
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2) A process in which liquid changes into vapor or gas by boiling, is called a. distillation b. filtration c. evaporation d. fractional distillation
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3) A technique which is used to separate and identify the different constituents of mixture is called a. paper chromatography b. color chromatography c. dye chromatography d. chemical chromatography
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4) Air is a mixture of a. elements b. compounds c. gases d. molecules
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5) A separation technique which uses fractionating column to separate different liquid components in a mixture with different boiling points by heating the mixture is called a. fractional distillation b. filtration c. evaporation d. distillation
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6) Petroleum, gasoline, kerosene, diesel and paraffin wax are yielded to fractional distillation of a. mustard oil b. sunflower oil c. crude oil d. almond oil
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7) The crystals of dry ice that keep things cold are a solid state of a. carbon dioxide b. oxygen c. helium d. nitrogen
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8) Breakdown or formation of compound involves a. chemical reaction b. heating c. passing electricity through d. all of above
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9) A substance which is made by mixing two elements without being chemically combined is called a a. solute b. compound c. mixture d. solution
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10) Water can be separated from mud by the help of a. distillation b. filtration c. evaporation d. fractional distillation
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