Chemistry 0620 · IGCSE · Rate of reaction

Rate of reaction — practice question

Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen. Why does magnesium powder undergo reaction more quickly than magnesium ribbon?

  • AThe magnesium atoms in the powder have a lower activation energy.
  • BThe powder has a smaller surface area.
  • CThe magnesium atoms in the powder have more frequent collisions with acid particles.
  • DThe magnesium atoms in the powder have greater kinetic energy.

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