Which of the following category of a "pure substance"? (a) ice (b) milk (c) iron (d) hydrochloric acid (e) calcium oxide (f) mercury (g) brick (h) wood (I) air?

Which of the following category of a "pure substance"? (a) ice (b) mil

1.	Which of the following category of a "pure substance"? (a) ice (b) milk (c) iron (d) hydrochloric acid (e) calcium oxide (f) mercury (g) brick (h) wood (I) air?
Answer» WOOD CATEGORY of PURE SUBSTANCE