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

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Question # 1

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 2

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 3

The number of translation degress of freedom for a diatomic gas is

Question # 4

The curve representing an isothermal process is called

Question # 5

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 6

The volume of universal gas constant R is:

Question # 7

The curve representing an adiabatic process is called

Question # 8

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 9

The relationship between Boltzmann constant k with R and NAis given as:

Question # 10

An isochoric process is one which take place at

Question # 11

One mole of any substance contain

Question # 12

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 13

We cannot utilize the heat contents of oceans and atmosphere because

Question # 14

Hotness and coldness of an object is represented in terms:

Question # 15

When heat is removed from the system

Question # 16

The state in which ice, water and vapour coexists in equilibrium is called

Question # 17

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

Question # 18

The nature of thermal radiation is similar to:

Question # 19

Melting point of ice

Question # 20

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 21

According to the second law, which is must to produce work

Question # 22

If the formula PV = nRT, n denotes:

Question # 23

Which of the following is a state variable

Question # 24

Absolute zero is considered as that temperature at which:

Question # 25

We can express the work in term of

Question # 26

In a heat engine, heat is supplied by the

Question # 27

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 28

The temperature scale approved in SI units is:

Question # 29

Adiabatic change occurs when the gas

Question # 30

The percentage of available heat energy converted into work by a petrol engine is roughly

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In the reverse process, the working substance passes through the same stages as in the direct process and
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
2 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
3 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
4 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
5 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
6 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
7 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
8 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
9 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
10 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them

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