Which one of the following statement-s- is-are -not-true about the effect of an increase in temperature on the distribution of molecular speeds in a gas-The most probable speed increases-The fraction of the molecules with the most probable speed increases-The distribution becomes broader-The area under the distribution curve remains the same as under the lower temperature-

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Standard XII

Chemistry

Maxwell's Distribution of Speeds

Which one of ...

Question

Which one of the following statement(s) is/are not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

The most probable speed increases.

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The fraction of the molecules with the most probable speed increases.

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The distribution becomes broader.

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The area under the distribution curve remains the same as under the lower temperature.

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Solution

The correct option is B
The fraction of the molecules with the most probable speed increases.

According to Maxwell's distribution, the most probable velocity increases as the fraction of molecules possessing most probable velocity decreases.The distribution becomes broader.

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According to Maxwell, Boltzmann distribution of energy, ......... .
(a) the fraction of molecules with most probable kinetic energy decreases at higher temperatures
(b) the fraction of molecules with most probable kinetic energy increases at higher temperatures
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(d) most probable kinetic energy decreases at higher temperatures

In the graph showing Maxwell, Boltzmann distribution of energy ........ .
(a) area under the curve must not change with an increase in temperature
(b) area under the curve increases with increase in temperature
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(d) with an increase in temperature, curve broadens and shifts to the right-hand side

Q. Assertion :The area under the Maxwell distribution molecular speed curve remains same irrespective of the temperature of the gas. Reason: The fraction of molecules with most probable speed increases with the increase of temperature.

Q. Assertion :In maxwell distribution curve, with increase in temperature the fraction of molecules possessing most probable velocity increases. Reason: With increasing temperature molecular velocities increases.

Q. Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas

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Which one of the following statement(s) is/are not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

The correct option is B The fraction of the molecules with the most probable speed increases. According to Maxwell's distribution, the most probable velocity increases as the fraction of molecules possessing most probable velocity decreases.The distribution becomes broader.

The correct option is B
The fraction of the molecules with the most probable speed increases.

According to Maxwell's distribution, the most probable velocity increases as the fraction of molecules possessing most probable velocity decreases.The distribution becomes broader.