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प्रश्न
Give reason: Graphite is used to make a lead of the pencils.
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उत्तर
Graphite leaves mark on the paper and makes it black.
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संबंधित प्रश्न
Name the substance you will add to speed up sedimentation.
Name: a Liquid Non-metal
Define Elements.
Give reason: A frying pan is made up of steel but its handle is made up of wood.
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
State what are radicals. Give the names of the radicals –
(a) NO3
(b) OH
(c) SO4
(d) CO3
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
Differentiate between elements and compounds.
Higher-Order Thinking questions:
Why is hydrogen considered an element?
