ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

00:00
Question # 1

The temperature of gas is produced by

Question # 2

In all natural processes where heat flows from one system to another, there is always a net

Question # 3

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 4

The rate of change of momentum of a molecule is equal to:

Question # 5

The absolute temperature for an ideal gas is

Question # 6

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 7

In thermodynamics, internal energy is the function of

Question # 8

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 9

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 10

The absolute temperature of the tripple point of water is

Question # 11

If the formula PV = nRT, n denotes:

Question # 12

Pressure of a gas at constant volume is proportion to

Question # 13

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 14

The example of irreversible process is

Question # 15

Which of the following is not thermo dynamical function?

Question # 16

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 17

Boyle's law is applicable in

Question # 18

In the study of thermodynamics, which gas is considered as the working substance

Question # 19

The disorder in the system increases due to the

Question # 20

No spark plug is needed in

Question # 21

The temperature scale approved in SI units is:

Question # 22

Adiabatic change occurs when the gas

Question # 23

Maximum density of H2O is at the temperature

Question # 24

The work done on the system by the environment is considered as

Question # 25

The product of the pressure and volume of an ideal gas is

Question # 26

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 27

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 28

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 29

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 30

The behaviour of gases is well accounted by the kinetic theory based on

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
2 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
3 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
4
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
5 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
6 If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
7 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
8 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
9 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
10 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V

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