Pure limestone is called _______?
Correct answer: B. Calcium Carbonate
- A. Aluminum Oxide
- B. Calcium Carbonate
- C. Calcium Sulphate
- D. None of these
Explanation
Pure limestone is calcium carbonate, CaCO₃, the same chemical compound found in chalk and marble in different forms. Calcium sulphate is associated with gypsum, not limestone.
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Chemical principles appear in acids, bases, salts, solutions, oxidation, combustion, corrosion and neutralisation, along with the composition and uses of common substances. Coverage includes soaps and detergents, fertilizers, medicines, food preservatives, polymers, fuels and water treatment, while distinguishing physical changes from chemical reactions.
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