JAMB - Chemistry (2021 - No. 16)

Which of the following is a form of calcium carbonate?

I. limestone
II. marble
III. chalk
Iv. egg-shells

I only

I, II and IV

I and II only

I, II, III, and IV

- Calcium trioxocarbonate (IV) occurs abundantly in earth's crust as limestone, chalk and marble

- Eggshell is made almost entirely of calcium carbonate (CaCO3) crystals.