Rate constant and activation energy of potassium permanganate and oxalic acid reaction

1. According to the experiment, at which temperatures below is the reaction fastest ?
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2. From the experiment, what will be your conclusion when we increase the temperature for a chemical reaction?
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3. The reaction between potassium permanganate and oxalic acid follows ?
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4. The unit of the activation energy is ?
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5. Before mixing of KMnO4 with oxalic acid, why have we kept both solution solutions in the water bath for 5 minutes?
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