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Molecular Arrangement of Matter

Which of the ...

Question

Which of the following substances are elements?

Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine

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Solution

Elements are mercury, iron, diamond, nitrogen, graphite, hydrogen, oxygen and chlorine.

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Q. Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine

Q. Which of the following are 'pure substances' ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

Q. Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond

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Q. Separate these substances into elements, compounds and mixtures: air, copper, sea water, nitrogen, soil, mercury, lemon squash, sugar and vitamin C

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