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Which of the following material fall in the category of a pure substance ?

Posted by Vipin Kumar 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Vishal Chaudhary 3 years, 10 months ago

All elements and compounds are pure substance

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Yogita Ingle 3 years, 10 months ago

Pure substance is one that does not have any other substance or impurity present in it and cannot be separated into other kinds of matter by physical processes. It can be an element or a compound.

Out of the given nine compounds following are the pure substances
Ice, iron, hydrochloric acid, calcium oxide, mercury are pure substances as they have definite composition.
Milk is a colloid and acts as a heterogeneous mixture hence is not a pure substance.
Brick and air are made up of more than one substance hence they also don’t fall in the category of pure substances.

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