question_answer

  Four experimental set ups are shown below to study the reaction of HCl and NaOH on zinc and sodium carbonate. Which would be the set-up (s) that would result in rapid evolution of gas would be?

Answer:

                  The reaction between (I) Zn and dilute HCl and (III) dilute HCl and  are fast (as ionic reaction) whereas the reaction between (II) Zn and NaOH is slow. There is no reaction between (IV) NaOH and .