Question

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 (g) Back (h) Wood (i) Air.​

Answer 1

Answer:

c) Iron

f) Mercury

Explanation:

Pure substance is made of only one type of atom. They are elements.

Answer 2

The Pure Substances are:-

(a) Ice

(c) Iron

(d) Hydrochloric Acid

(e) Calcium Oxide

(f) Mercury

(i) Air