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Science HomeworkIs matter around us pure?1.The metal which normally exist in liquid state is:(a) sodium (b) mercury (c) magnesium (d)iron2.On the basis of composition of matter, milk is considered to be:(a) pure substance (b) impure substance (c) compound (d) element3.State a reason why you think air is a mixture not a compound.4.Write two points of difference between simple distillation andfractional distillation. Write example where fractional distillation isused.5.(i) Name the techniques which you will apply for the separation ofmixtures:(a) small pieces of metal in the engine oil of a car. (b) mud particles suspended in water. (c) oil from water(d) sodium chloride from its solution in water(e) camphor from salt. (f) wheat grains from husk(ii) Classify the following as a chemical or physical change:(a) Water boils to form steam(b) Burning of paper(c) An almirah gets rusted. (d) Making a fruit salad with raw fruits |
| Answer» <html><body><p></p><p><img align="absmiddle" alt="\mathcal{\huge{\pink{\star\:answer...!!\:\star}}}" class="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=%5Cmathcal%7B%5Chuge%7B%5Cpink%7B%5Cstar%5C%3Aanswer...%21%21%5C%3A%5Cstar%7D%7D%7D" title="\mathcal{\huge{\pink{\star\:answer...!!\:\star}}}"/></p><h2><strong>1</strong><strong>-</strong><strong>M</strong><strong>E</strong><strong>R</strong><strong>C</strong><strong>U</strong><strong>R</strong><strong>Y</strong></h2><h2><strong>2</strong><strong>-</strong><strong>P</strong><strong>U</strong><strong>R</strong><strong>E</strong><strong> </strong><strong>SUBSTANCE</strong></h2><h2><strong>5</strong><strong>-</strong><strong>a</strong><strong> </strong><strong>MAGNETIZATION</strong></h2><p></p><p></p><p></p><p></p><p></p><p></p><p><strong>YOU</strong><strong> </strong><strong>CAN</strong><strong> </strong><strong>DO</strong><strong> </strong><strong>THESE</strong><strong> </strong><strong>BY</strong><strong> </strong><strong>YOURSELVES</strong></p></body></html> | |