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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
Write true or false
All pure substances have characteristic melting and boiling points.
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Name: a non-metal which is lustrous
Give one use of the following substance:
Brass
Indicate whether the following statement is true or false:
Ozone is a triatomic molecule
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Differentiate between homogenous & heterogeneous mixtures.
Give an example of two liquids that form heterogeneous mixtures.
The first letter of an element is always written in ______ letter.
______ is the life-giving element is the air.
