Which of the following is a form of calcium carbonate?
I. limestone
II. marble
III. chalk
Iv. egg-shells
A
I only
B
I, II and IV
C
I and II only
D
I, II, III, and IV
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
- Calcium trioxocarbonate (IV) occurs abundantly in earth's crust as limestone, chalk and marble
- Eggshell is made almost entirely of calcium carbonate (CaCO3) crystals.
Source: WAEC / JAMB / NECO Classroom Archive (Record #60473)