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Question
In presence of a catalyst the heat evolved or absorbed during a reaction-
Increases
Decreases
May increase ofr decrease
Remains unaffected
ANSWER : 4
Descrption
<p style="margin-left:0px;">In the presence of a catalyst, the heat evolved or absorbed during a reaction <strong>remains unaffected</strong>.</p><p style="margin-left:0px;">Here's why:</p><ul><li>A catalyst works by providing an alternative reaction pathway with a lower activation energy. This lower activation energy allows the reaction to proceed faster, but it doesn't change the overall energy difference between the reactants and products.</li><li>The heat evolved or absorbed during a reaction (enthalpy change, ΔH) is the difference between the potential energy of the reactants and the potential energy of the products. This difference remains constant regardless of the reaction pathway.</li></ul>
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