Define a pure substance. How many types of pure substance do you know?

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Solution

Any substance that is made up of single type of particles that have same chemical nature. For example water, sugar, salt, sodium, tin etc.
i) Elements - examples are iron, silver, gold mercury etc.
ii) Compounds - examples are water, carbon dioxide, methane, vinegar etc.

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STATEMENT 1: A pure substance consists of a single type of matter.

STATEMENT 2: A pure substance consists of more than one type of matter.

STATEMENT 3: Milk is a not a pure substance.

STATEMENT 4: Pure substance has same chemical nature.

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