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20 January, 20:43

The activation energy of a chemical reaction can be decreased by the addition of

(1) a catalyst (3) electrical energy

(2) an indicator (4) thermal energy

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  1. 20 January, 21:11
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    The correct answer is option 1. It should be noted that a catalyst does not lower or decrease the activation energy because instead it provides an alternative route for the reaction to proceed. This speeds up a chemical reaction without being changed.
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