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प्रश्न
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
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उत्तर
Element: Mercury, sulphur, gold, carbon, oxygen, iron.
Compound: Sugar, water, sand, alcohol, marble, baking soda.
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संबंधित प्रश्न
Define mixture.
Differentiate between:
Homogenous and heterogenous substances
Name: a Non-metal Which is a Good Conductor of Electricity.
Mention three gaseous elements and write their molecular formulae
Name: Two substances used to make electric wires
Tick (√) the correct alternative from the choice given for the following statement.
Sulphur and carbon are
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
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Name – two coloured gases (with their colours)
Complete the statement with the correct words.
Acid’s are chemicals which are _____ in taste and derived from plants and ________.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
