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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasy
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In which reaction is carbon dioxide gas most likely to be evolved?

Answer and explanation

Correct answer: Sodium carbonate and hydrochloric acid

The governing reaction pattern is acid plus carbonate producing salt, water, and carbon dioxide. Sodium carbonate reacts with hydrochloric acid as Na2CO3 + 2HCl → 2NaCl + H2O + CO2↑, so option B is correct. Zinc with acid usually releases hydrogen, sodium hydroxide with acid gives neutralisation, and magnesium oxide with acid gives salt and water without carbon dioxide.

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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