The rate of the hydrogen in the reaction Zn(s) + 2HCI (aq) → ZnCI 2(g) + H 2(aq) + H 2(g) can be increased by

  • A using Zinc powder instead of Zinc granules
  • B using dilute instead of concentrated hydrochloric acid
  • C cooling the container in which the mixture is placed
  • D using an alloy of zinc instead of pure zinc
  • E using hydrogen chloride gas instead of hydrochloric acid solution
waec 1989chemistry

The correct answer is A. using Zinc powder instead of Zinc granules

No explanation given
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