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Question

Which of the following factors will initially increase the forward rate of the following exothermic reaction?
XforrevY+heat
I. Increasing the temperature
II. Increasing the concentration of X
III. Adding a catalyst

A
I, II, and III
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B
I and II only
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C
II and III only
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D
I only
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Solution

The correct option is C II and III only
The given reaction is exothermic. So, by Le Chatelier's principle, the decrease in temperature will favour forward reaction.

XY+heat

If a concentration of X is increased then by Le Chatelier's principle, to compensate for this increase, the forward reaction is favoured. The addition of catalysts initially increases the forward reaction.

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