Question

Classify the following substances into elements, compounds and mixtures.Air, Sea water, Sugar, Salt solution, Water, 22 karat Gold, Calcium Oxide, Brass, Hydrogen, Smoke, Salt, Carbon dioxide, Helium, Nitrogen

Answer 1

Elements : ↓

Hydrogen, Helium and Nitrogen.

Compounds : ↓

Sugar (C₁₂H₂₂O₁₁), Salt, Water, Calcium oxide, Carbon dioxide

Mixtures : ↓

Air, Sea water, salt solution, 22 karat Gold, Brass, Smoke.

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