Question

Is brick and hydrochloric acid a pure substance ?

Answer 1

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:

Answer 2

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.