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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasy
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Which gas is formed when an acid reacts with a carbonate?

Answer and explanation

Correct answer: Carbon dioxide

Acids react with carbonates to produce a salt, water, and carbon dioxide gas. The general reaction is acid + carbonate → salt + H₂O + CO₂; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Thus option B is correct. Hydrogen is released in many acid–metal reactions, whereas chlorine and ammonia require different reactants and are not general products here.

Related tags

CarbonateAcid ReactionCarbon DioxideAcidsBasesAnd 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?
  4. 4What is the general nature of an aqueous soap solution?
  5. 5Which of the following substances turns red litmus paper blue?
  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?
  10. 10A student dips red litmus paper into a soap solution. What will be the colour of the litmus paper?
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