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Compressibility factor, Z, of a gas is given as Z = pVnRT. For real gas what will be the effect on value of Z above Boyle’s temperature?

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प्रश्न

Compressibility factor, Z, of a gas is given as Z = `(pV)/(nRT)`. For real gas what will be the effect on value of Z above Boyle’s temperature?

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उत्तर

For real gas, the value of Z > 1 above Boyle's temperature .

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अध्याय 5: States of Matter - Multiple Choice Questions (Type - I) [पृष्ठ ५८]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
अध्याय 5 States of Matter
Multiple Choice Questions (Type - I) | Q 32.(ii) | पृष्ठ ५८

संबंधित प्रश्न

Which of the following is the correct expression for the equation of state of van der Waals gas?


The value of the universal gas constant depends upon


Maximum deviation from ideal gas is expected from


Which of the following diagrams correctly describes the behaviour of a fixed mass of an ideal gas? (T is measured in K)


In what way real gases differ from ideal gases.


Can a Van der Waals gas with a = 0 be liquefied? explain.


Suppose there is a tiny sticky area on the wall of a container of gas. Molecules hitting this area stick there permanently. Is the pressure greater or less than on the ordinary area of walls?


Explain whether a gas approaches ideal behavior or deviates from ideal behaviour if it is compressed to a smaller volume at a constant temperature.


Which of the following gases would you expect to deviate from ideal behavior under conditions of low-temperature F2, Cl2, or Br2? Explain.


A plot of volume (V) versus temperature (T) for a gas at constant pressure is a straight line passing through the origin. The plots at different values of pressure are shown in Figure. Which of the following order of pressure is correct for this gas?


Under which of the following two conditions applied together, a gas deviates most from the ideal behaviour?

(i) Low pressure

(ii) High pressure

(iii) Low temperature

(iv) High temperature


Value of universal gas constant (R) is same for all gases. What is its physical significance?


Pressure versus volume graph for a real gas and an ideal gas are shown in figure. Answer the following questions on the basis of this graph.

(i) Interpret the behaviour of real gas with respect to ideal gas at low pressure.

(ii) Interpret the behaviour of real gas with respect to ideal gas at high pressure.

(iii) Mark the pressure and volume by drawing a line at the point where real gas behaves as an ideal gas.


Assertion (A): At constant temperature, pV vs V plot for real gases is not a straight line.

Reason (R): At high pressure all gases have \[\ce{Z}\] > 1 but at intermediate pressure most gases have \[\ce{Z}\] < 1.


Isotherms of carbon dioxide gas are shown in figure. Mark a path for changing gas into liquid such that only one phase (i.e., either a gas or a liquid) exists at any time during the change. Explain how the temperature, volume and pressure should be changed to carry out the change.


In van der Waal's equation for the real gas, the expression for the net force of attraction amongst the gas molecules is given by:


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