Question

pure water?
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
(f) Mercury
Brick
(h) Wood
(i) Air .​

Answer 1

Answer:

Ice, iron, hydrochloric acid, calcium oxide, mercury are pure substances

Explanation:

as they have definite composition.

Answer 2

Following substance from the above mentioned list are pure substance :

★Iron

★Ice

★Hydrochloric acid

★Calcium oxide

★Mercury