According to Maxwell Boltzmann distribution of energy,.........

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most probable kinetic energy decreases at higher temperatures

the fraction of molecules with most probable kinetic energy decreases at higher temperatures

the fraction of molecules with most probable kinetic energy increases at higher temperatures

most probable kinetic energy increases at higher temperatures

answer is A, C.

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Detailed Solution

Distribution of kinetic energy may be described by plotting a graph of fraction of molecules versus kinetic energy.

Kinetic energy of maximum fraction of molecule is known as most probable kinetic energy. It is important to note that with increase of temperature, peak shifts forward, then
downward. This means that with increase of temperature,
(i) most probable kinetic energy increases.
(ii) the fractions of molecules possessing most probable kinetic energy decreases.

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