English
Karnataka Board PUCPUC Science Class 11

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 Z > 1 but at intermediate pressure most gases have Z < 1.

Advertisements
Advertisements

Question

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.

Options

  • Both A and R are true and R is the correct explanation of A.

  • Both A and R are true but R is not the correct explanation of A.

  • A is true but R is false.

  • A is false but R is true.

MCQ
Advertisements

Solution

Both A and R are true but R is not the correct explanation of A.

Explanation:

At constant temperature, the pV vs V plot for real gases is not a straight line because there is intermolecular attraction present in real gases which is absent in ideal gases; hence ideal gases form a straight line in the pV vs V plot at constant temperature.

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: States of Matter - Multiple Choice Questions (Type - I) [Page 61]

APPEARS IN

NCERT Exemplar Chemistry [English] Class 11
Chapter 5 States of Matter
Multiple Choice Questions (Type - I) | Q 45 | Page 61

RELATED QUESTIONS

Calculate the volume occupied by 8.8 g of CO2 at 31.1°C and 1 bar pressure. R = 0.083 bar L K–1 mol–1.


The value of the universal gas constant depends upon


Compressibility factor for CO2 at 400 K and 71.0 bar is 0.8697. The molar volume of CO2 under these conditions is


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


25 g of each of the following gases are taken at 27°C and 600 mm Hg pressure. Which of these will have the least volume?


In what way real gases differ from ideal gases.


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 more gas is introduced into the same volume and at the same temperature.


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


Write the Van der Waals equation for a real gas. Explain the correction term for pressure and volume.


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


If 1 gram of each of the following gases are taken at STP, which of the gases will occupy (a) greatest volume and (b) smallest volume?

\[\ce{CO, H2O, CH4 , NO}\]


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


Compressibility factor, Z, of a gas is given as Z = `(pV)/(nRT)`. What is the value of Z for an ideal gas?


Match the following graphs of ideal gas with their co-ordinates:

Graphical representation x and y co-ordinates
(i) (a) pV vs. V
(ii) (b) p vs. V
(iii) (c) p vs. `1/V`

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:


Choose the correct option for the total pressure (in atm.) in a mixture of 4g \[\ce{O2}\] and 2g \[\ce{H2}\] confined in a total volume of one litre at 0°C is ______.

[Given R = 0.082 L atm mol−1K−1, T = 273 K]


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×