1.

Is brick and hydrochloric acid a pure substance ?

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Answer:

  • 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.

Explanation:


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