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Standard XII

Chemistry

Molecular Speeds - Vrms, Vavg, Vmps

Assertion :In...

Question

Assertion :In Maxwell-Boltzmann distribution of speeds, the curve broadens at higher temperature. Reason: At a particular temperature, the individual speed of molecules as well as the distribution of speeds remains the same.

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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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Speed distribution curve broadens at higher temperature because number of molecules moving at higher speed increases. At a particular temperature, the individual speed of molecules keeps changing but the distribution of speeds remains same.

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Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

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(c) Assertion is correct, but reason is incorrect
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