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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

When an acid reacts with a carbonate, the products are a salt, water, and carbon dioxide. The overall pattern is acid + carbonate → salt + H₂O + CO₂. For example, hydrochloric acid reacts with calcium carbonate to form calcium chloride, water, and carbon dioxide. Therefore option B is correct. Hydrogen is associated with acid-metal reactions, while chlorine and ammonia are not normal products of this reaction.

Related tags

CarbonateAcid ReactionCarbon DioxideGas EvolutionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour
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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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