2026 · Q66
Which of the following are the forms of calcium carbonate?
- 1Marble
- 2Chalk
- 3Limestone Select the answer using the code given below:
General KnowledgeChemistry
- A1 and 2 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Explanation
Marble, chalk and limestone are all natural forms of calcium carbonate (CaCO3): marble is metamorphosed limestone, chalk is a soft biogenic form, and limestone is the sedimentary rock. All three statements are correct. The answer is (D) 1, 2 and 3.