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

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 # 2

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 3

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 # 4

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 5

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

Question # 6

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 7

The absolute temperature for an ideal gas is

Question # 8

We cannot utilize the heat contents of oceans and atmosphere because

Question # 9

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 # 10

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 11

A heat engine is that which converts

Question # 12

Electromagnetic waves emitted by hot bodies are called:

Question # 13

When two objects are rubbed together, their internal energy

Question # 14

If the formula PV = nRT, n denotes:

Question # 15

The temperature of gas is produced by

Question # 16

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

Question # 17

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 18

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

Question # 19

The process which is carried out at constant temperature is known as

Question # 20

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

Question # 21

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

Question # 22

No spark plug is needed in

Question # 23

Sadi carnot described an ideal heat engine in

Question # 24

Boyle's law is applicable in

Question # 25

In an ideal gas, the molecules have:

Question # 26

Good absorbers of heat are

Question # 27

A succession of events which bring the system back to its initial condition is called

Question # 28

Triple point of water is

Question # 29

If an amount of heat enters the system it could

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
2 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
3 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
4 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
5 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
6 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
7 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
8 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
9 An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
10 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880

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