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  • which of the following statement are correct? (a) A real gas can be liquefied if it than its critical temperature. (b) A real gas is expected to behave ideally at high temperantion

which of the following statement are correct?

(a) A real gas can be liquefied if it than its critical temperature.
(b) A real gas is expected to behave ideally at high temperantion and low pressure.
(c) The increase in volume pen degree rise en celsius temperatione at constant pressure is \frac{V_0}{273.15}, where \mathrm{ V_0} is the volume of gas at OK.
(d) The race of diffusion is directly proportional to the square root of its kelvin temperature and abs inversely proportion al to the square root of its molar mass.v

Option: 1

 a and d only
 


Option: 2

 a and  c only


Option: 3

 b and d only 

 


Option: 4

c and d only 


Answers (1)

best_answer

Solution
(a) The gas can be liquefied if its temperature is less than its critical temperation.
(b) At high temperature the effect of intermolecular attractions, becomes insignificant. At low pressure, volume of the gas will be large and thus the volume occupied by gaseous molecules will be negligible.
(c) \mathrm{ V_0 }is the volume at \mathrm{ O_C }and not at \mathrm{ 0 \mathrm{~K} }.
(d) The rate of diffusion will be directly proportional to the are rage speed (or any other speed. such an root mean squcor speed) of its gaseous molecules which is given as-
\mathrm{ U_{a v}=\sqrt{\frac{8 R T}{\pi M}} \text { Hence, } U_{a v} \propto \sqrt{T} \text { and } U_{a v} \propto \sqrt{1 / M i} }
option (b) and (d) are correct.

Posted by

sudhir.kumar

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