Multiple choice

A chemical reaction at equilibrium is exothermic in the forward direction and endothermic in backward direction. What is the effect of increase of temperature on it?

  1. The equilibrium will shift in the backward direction so as to consume the heat evolved.

  2. The equilibrium shifts in the forward direction so as to liberate more heat.

  3. Equilibrium is not affected by change of temperature.

  4. It cannot be predicted.
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A Correct answer
Explanation

According to Le Chateliers principle, the increase of temperature should shift the reaction in the direction of absorbing the heat, i.e. the backward direction. So, the equilibrium will shift in the backward direction to consume the heat evolved.

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