Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.
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Homogeneous mixtures: Soda water, vinegar and filtered tea. Heterogeneous mixtures: Wood and soil.
Air is a homogeneous mixture of different gases.
However, if some dust or other particles are also present, then air becomes heterogeneous mixture.
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On heating calcium carbonate gets converted into calcium oxide and carbon dioxide: Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Classify the following into metals, non-metals and metalloids: Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.
Differentiate between physical and chemical change. Give one example of each. Give one example where both physical and chemical change is taking place.