Question

Which of the following materials fall into the category of pure substances? a) Water vapour b) Starch solution c) Sodium d) Sulphuric acid d) Sodium hydrogen carbonate e) Nitrogen f) Brick g) Brass h) Tincture of Iodine.

Answer 1

Answer:

a water vapour

b starch solution

c sodium

e Nitrogen

Answer 2

Answer:

sodium , water vapour, Nitrogen , starch solution