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Standard XII

Chemistry

System, Surroundings, Intensive, Extensive Properties

Assertion :Th...

Question

Assertion :The value of K increases with increase in temperature in case of endothermic reaction. Reason: The increase in temperature shifts the equilibrium in the backward direction in case of exothermic reaction.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
As we know,
$2.303 l o g \frac{K_{2}}{K_{1}} = \frac{Δ H}{R} \times [\frac{T_{2} - T_{1}}{T_{2} \times T_{1}}]$
In endothermic reaction,
as $Δ H = + v e$
so on increasing the temperature, K increases and reaction shifts to forward direction.

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Assertion :The value of K increases with increase in temperature in case of endothermic reaction. Reason: The increase in temperature shifts the equilibrium in the backward direction in case of exothermic reaction.

The correct option is D Assertion is incorrect but Reason is correctAs we know,2.303logK2K1=ΔHR×[T2−T1T2×T1]In endothermic reaction,as ΔH=+veso on increasing the temperature, K increases and reaction shifts to forward direction.