CBSE Questions for Class 11 Engineering Physics Kinetic Theory Quiz 2 - MCQExams.com

The deviation of gases from the behaviour of ideal gas is due to :
  • colourless molecules
  • covalent bonding of molecules
  • attraction of molecules
  • absolute scale of temperature
Pressure exerted by a perfect gas is equal to :
  • mean kinetic energy per unit volume
  • half of mean kinetic energy per unit volume
  • two third of mean kinetic energy per unit volume
  • one third of mean kinetic energy per unit volume
The nature of the graph of pressure 'P' against reciprocal of volume 'V' of an ideal gas at constant temperature is 
  • a straight line not passing through origin
  • a parabola
  • a straight line passing through origin
  • a rectangular hyperbola
Kinetic energy of a gas molecule depends on:
  • Pressure
  • Volume
  • Temperature
  • All the above
A polyatomic gas with n degrees of freedom has a mean energy per molecules given by :
  • $$\displaystyle \frac{n}{2}\, RT$$
  • $$\displaystyle \frac{1}{2}\, RT$$
  • $$\displaystyle \frac{n}{2}\, kT$$
  • $$\displaystyle \frac{1}{2}\, kT$$
The mean kinetic energy of a perfect mono atomic gas molecule at the temperature $$T^{o}K$$ is :
  • $$\displaystyle\ \frac{1}{2}kT$$
  • $$kT$$
  • $$\displaystyle\ \frac{3}{2}kT$$
  • $$2kT$$
The number of degrees of freedom for each atom of a monoatomic gas is :
  • 3
  • 5
  • 6
  • 1
The perfect gas equation for 4 gram of hydrogen gas is :
  • $$PV=RT$$
  • $$PV= 2RT$$
  • $$PV$$ = $$\displaystyle\ \frac{1}{2} RT$$
  • $$PV = 4RT$$
When a solid object is heated, the molecules that make up the object:
  • Begin to vibrate faster
  • Lose energy
  • Make frequent collisions
  • Both A and C
The forces of attraction between molecules is greatest in _____state.
  • Liquid
  • Gaseous
  • Solid
  • All of the above
The average kinetic energy of a molecule of a perfect gas is :
  • $$\dfrac{2}{3}k T$$
  • $$1.5kT$$
  • $$2.5kT$$
  • none of these
The plasma is created in stars due to:
  • high pressure
  • low pressure
  • high temperature
  • low temperature
The value of gas constant $$R$$ (in cal/mol-K) for hydrogen is :
  • $$\displaystyle\frac{1}{2}$$ 
  • $$2 $$
  • $$4$$ 
  • $$1 $$
The fluorescent tube and neon sign bulbs consists of:
  • solid
  • liquid
  • gas
  • plasma
The sun and stars glow because of the presence of :
  • gas
  • liquid
  • plasma
  • None of the above
The two scientists who predicted the fifth state of matter are:
  • Bose and Schrodinger
  • Einstein and Bose
  • Einstein and Schrodinger
  • Bose and Bohr
The temperature, to which a gas must be cooled before it can be liquified by pressure alone, is known as its 
  • Saturation point
  • Freezing point
  • Liquification temperature
  • critical temperature
In isothermal expansion of an ideal gas :
  • heat content remains constant
  • temperature remains constant
  • both heat content and temperature remain constant
  • pressure and temperature of the gas remain constant
A large glacier melts at the base but not at the top because
  • The base of the glacier remains in warmer surroundings
  • Ice at the base contains impurities
  • Due to high pressure ice at the base has its melting point lowered
  • Ice at the top is of different kind
The fifth state of matter i.e. Bose-Einstein condensate was proved in:
  • 1991
  • 1995
  • 2001
  • 2005
In which year Satyendra Nath Bose had done some calculations for fifth state of matter?
  • 1921
  • 1922
  • 1920
  • 1923
Which of the following do not have fixed shape but occupy definite volume?
  • Solid
  • Liquid
  • Both a and b
  • Gas

What does the kinetic theory of matter state?
  • All matter has space.
  • All matter has mass.
  • All matter is made up of particles.
  • All matter is bounded.
Diffusion is minimum in 
  • Liquid
  • Gas
  • Solid
  • Both gas and liquid
Kinetic energy of the particle is maximum in
  • Solid
  • Liquid
  • Gas
  • Same in liquid and gas
Rigidity is least in
  • Solid
  • Liquid
  • Gas
  • Both solid and gas
Fluidity is maximum in 
  • Gases
  • Solid
  • Liquid
  • Solid and gases
In Rutherford alpha particles scattering experiment, thin layer of which metal was used?
  • Aluminium
  • Gold
  • Silver
  • Zinc
In Rutherford's experiment, most of the alpha particles are observed to
  • Pass undeflecgted
  • Be deflected
  • Be thrown back
  • Be absorbed
The order of the energy of the energy shell is 
  • K > L > M > N
  • K < L < M < N
  • K > L > N > M
  • K < L > N > M
Density is least in
  • Sold
  • Liquid
  • Both A and B
  • Gas
Absolute zero (0K) is that temperature at which
  • Matter ceases to exit
  • Ice melts and water freezes
  • Volume and pressure of a gas become zero
  • None of the above
According to kinetic theory of matter particles of matter:
  • particles of matter are small
  • they are in random motion
  • they do not have space between them
  • both a and b
The average kinetic energy of the particles of a gas is most closely associated with which of the following quantity? 
  • heat capacity.
  • temperature.
  • specific heat.
  • absolute zero.
  • potential enemy.
The pictured graphs are intended to show the relationship between the volume of a gas and the pressure of the gas. Which graph most likely shows that the volume of the gas is inversely proportional to its pressure?
Which of the following property is used to identify whether a substance is a solid, liquid or gas ?
  • Conductivity
  • Number of protons
  • Temperature
  • Number of neutrons
  • Resistively
According to Kinetic theory of gases , gases consist of particles that continue in:
  • straight line
  • zig zag line
  • circle
  • no particular line
Pressure of an ideal gas is increased by keeping temperature constant. What is effect on kinetic energy of molecules?
  • Increase
  • Decrease
  • No change
  • Cannot be determined
The number of degrees of freedom in an oxygen molecule is 
  • 3
  • 4
  • 5
  • 6
The lowest pressure (the best vaccum) that can be created in laboratory at $$20^{\circ}C$$ is $$10^{-10}\ mm$$ of $$Hg$$. At this pressure, the number of ideal gas molecules per $$cm^{3}$$ will be
  • $$3.22\times 10^{12}$$
  • $$1.61\times 10^{12}$$
  • $$3.29\times 10^{6}$$
  • $$3.22\times 10^{5}$$
The average energy per molecule of a triatomic gas at room temperature T is?
  • $$3kT$$
  • $$\dfrac{1}{2}kT$$
  • $$\dfrac{3}{2}kT$$
  • $$\dfrac{5}{2}kT$$
Total number of degrees of freedom of a rigid diatomic molecule is 
  • 3
  • 6
  • 5
  • 2
  • 7
The value of universal gas constant is $$8.3\ J/mole/K$$, the mean kinetic energy of $$32gm$$ of oxygen at $$-73^oC$$ will be
  • $$480\ J$$
  • $$4980\ J$$
  • $$2490\ J$$
  • $$100\ J$$
Under which of the following conditions is the law $$pV=RT$$ obeyed most closely by a real gas?
  • High pressure and high temperature
  • Low pressure and low temperature
  • Low pressure and high temperature
  • High pressure and low temperature
The S.I. unit of universal gas constant is
  • $$Watt K^{-1}mol^{-1}$$
  • $$ N K^{-1}mol^{-1}$$
  • $$JK^{-1}mol^{-1}$$
  • $$erg K^{-1}mol^{-1}$$
State whether True or False, and correct the statements if false:
(i) the molecules of solids are tightly packed.
  • True
  • False
Two gases, carbon monoxide $$(CO)$$ and nitrogen $$(N_2)$$ at the same temperature, have kinetic energies $$E_1$$ and $$E_2$$ respectively. Then :
  • $$E_1 = E_2$$
  • $$E_1 > E_2$$
  • $$E_1 < E_2$$
  • $$E_1$$ and $$E_2$$ cannot be compared
Which of the following is correct?
(Internal pressure in Van der Waal's equation)
  • $${ C }_{ V }={ \left( \cfrac { \partial U }{ \partial T } \right) }_{ P }\quad $$
  • $${ C }_{ P }={ \left( \cfrac { \partial H }{ \partial T } \right) }_{ V }\quad $$
  • $${ C }_{ P }-{ C }_{ V }=R$$
  • $${ \left( \cfrac { \partial U }{ \partial T } \right) }_{ t }=\cfrac { -a }{ { V }^{ 2 } } $$
At room temperature (27$$^0$$ C) the rms speed of the moleculesof certain diatomic gas is found to be 1920 ms$$^{-1}$$ then the molecule is:
  • $$H_2$$
  • $$F_2$$
  • $$O_2$$
  • $$Cl_2$$
At what temperature does the average transnational kinetic energy of a molecule in a gas become equal to kinetic energy of an electron accelerated from rest through a potential difference of $$1$$ volt? ($$k=1.38 \times 10^{-23}J/K)$$
  • $$3770K$$
  • $$7370 K$$
  • $$7730 K$$
  • $$7330 K$$
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