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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsMedium
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Which pair will react to form salt, water and carbon dioxide?

Answer and explanation

Correct answer: Hydrochloric acid and sodium carbonate

An acid reacts with a metal carbonate to produce a salt, water and carbon dioxide. For the pair in option A, the balanced equation is 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂. This exactly gives all three products named in the question. Sodium hydroxide and water do not provide an acid-carbonate reaction, sodium chloride is already a salt, and sugar with water is not the required reaction. Therefore, option A is correct.

Related tags

Acid-Carbonate-ReactionSaltWaterCarbon-DioxideAcidsBasesAnd 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?
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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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