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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsMedium
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Which pair will react to form calcium sulphate and water?

Answer and explanation

Correct answer: Calcium oxide and sulphuric acid

The governing concept is neutralisation of a basic metal oxide by an acid. Calcium oxide reacts with sulphuric acid according to CaO + H2SO4 → CaSO4 + H2O, producing exactly calcium sulphate and water. Therefore option A is correct. A carbonate would also release carbon dioxide in an acid reaction, while the other listed pairs do not provide the stated products under the given conditions.

Related tags

Metal OxideCalcium SulphateNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience
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10 more MCQs
  1. 1What type of substance turns blue litmus paper red?
  2. 2What type of substance turns red litmus paper blue?
  3. 3Which of the following substances acts as a natural indicator?
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  6. 6What is the nature of a solution whose pH is less than 7?
  7. 7At 25°C, a solution with a pH greater than 7 is of which nature?
  8. 8A student dips red litmus paper into a soap solution. What change will occur in the red litmus paper?
  9. 9Which gas is generally produced when dilute acids react with active metals?
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