Question

which of the following substance acts as a pure substance?​

Answer 1

Answer:

Out of the given nine compounds, the following are 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.

Answer 2

Given question is not complete and it can be corrected as

Which of the following materials fall in the category of a pure substance, ice, milk, iron, hydrochloric acid, calcium oxide, mercury, brick, air

Explanation:

• The materials that fall in the category of Pure Substance are Ice, iron, hydrochloric acid, calcium oxide, and mercury.
• These are pure substances Ice, iron, hydrochloric acid, calcium oxide, and mercury that have a definite composition.
• It is not a pure substance. because Milk is a colloid and thus it acts as a heterogeneous mixture.
• Milk, Brick, and air are not pure substances.
• The substance which are made up of more than one substance hence they also don't fall in the category of pure substances.
• #SPJ2