Question

7.
Which of the following materials fall in the category of a "pure
substance"?
(a) Ice
(b) Milk
(c) Iron
(d) Hydrochloric acid
(e) Calcium oxide
(1) Mercury
Brick
(h) Wood
(1) Air.​

Answer 1

Answer:

Pure substances :

Ice,

Iron,

Hydrochloric acid,

Mercury,

Water.

Explanation:

I HOPE IT'S HELPFUL FOR YOU.

Answer 2

Answer:

Ice , iron , hydrochloric acid , calcium oxide , mercury are the pure substances as they have definete composition.

Milk is colloid and act as heterogeneous mixture hence it is not a pure substance.

Brick and air are made up of more than one substances hence they also don't fall in the category of pure substances.

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