Classify the following materials as homogeneous mixtures and heterogeneous mixtures: Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.
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Homogeneous mixtures: Soda water, air, vinegar, alcohol and water mixture, sugar and water mixture, Copper sulphate solution.
Heterogeneous mixture: Wood, petrol and water mixture, chalk and water mixture.
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Classify the following into metals, non-metals and metalloids: Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.
You are given two samples of water labelled as $‘A’$ and $‘B’$. Sample $‘A’$ boils at $100^\circ\ C$ and sample $‘B’$ boilsa $102^\circ\ C$. Which sample of water will not freeze at $0^\circ C$? Comment.
$20\ g$ of sodium chloride is dissolved in $100\ mL$ of water. How will you test whether the given solution is saturated or unsaturated at the given temperature?