Q.1) Classify the element based on there physical state?

1.	Q.1) Classify the element based on there physical state?
Answer» There are three states of matter – solid, liquid and gas.Solids: Matters which have fixed volume and shape are called solids. For example - stone, wood, brick, ice, sugar, salt, coal, etc.All metals are solid except mercury and gallium.Liquid: Matters which have fixed volume but indefinite shape are called liquids. For example - milk, water, petrol, kerosene, alcohol, oil, etc. Since liquid can flow, it is also called fluid.Gas: Matters which have indefinite shape and volume are called solids. For example - air, oxygen, hydrogen, nitrogen, carbon-dioxide, etc.

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