JAMB Chemistry 2010 Objective — Question 28
Question 28 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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28. In the preparation of oxygen by heating KClO3 in the presence of MnO2, only moderate heat is needed because the catalyst acts by A. increasing the rate of the reaction B. lowering the energy barrier of the reaction C. lowering the pressure of the reaction D. increasing the surface area of the reactant
- A. increasing the rate of the reaction
- B. lowering the energy barrier of the reactionCorrect
- C. lowering the pressure of the reaction
- D. increasing the surface area of the reactant
Explanation
All positive catalysts act by lowering the activation energy required for the respective reactions to occur, which allows the reaction to proceed with only moderate heat.
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