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Standard XI
Chemistry
Kinetic Energy and Molecular Speeds
Question

In the graph showing Maxwell Boltzman distribution of energy, ___________.

A
area under the curve decreases with increase in temperature.
B
area under the curve increases with increase in temperature.
C
area under the curve must not change with increase in temperature.
D
with increase in temperature curve broadens and shifts to the right-hand side.
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Solution
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Correct option is D. with increase in temperature curve broadens and shifts to the right-hand side.
When the temperature is raised, the maximum of the curve moves to the higher energy value and the curve broadens out, i.e., spreads to the right such that there is a greater proportion of molecules with much higher energies.

The area under the curve must be constant since the total probability must be one at all times.

Hence, Option "A" & "D" are correct answers.

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