The chemical name of chalk is
Correct answer: D. Calcium carbonate
- A. Sodium nitrate
- B. Zinc sulfate
- C. Sulphuric acid
- D. Calcium carbonate
Explanation
Chalk is mainly calcium carbonate, CaCO₃, formed from compacted microscopic shells or other calcium-rich material. The other choices are different chemical substances, including an acid and salts.
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