Which of the following reactions is both an acid-base reaction and a gas evolution reaction?

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reaction of HCl(aq) and KOH(aq)

reaction of HCl(aq) and NaHCO3(aq)

reaction of 2 NaOH(aq), 2 Al(s), and 6 H2O(l)

reaction of 2 HCl(aq) and Mg(s)

2 Answers

  • reaction of HCl(aq) and NaHCO3(aq) => NaCl+ H2O+ CO2 (g) is the correct answer.

  • reaction of HCl(aq) and NaHCO3(aq) => NaCl + H2O + CO2(g)

    reaction of 2 HCl(aq) and Mg(s) => MgCl2 + H2(g)

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