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 an adiabatic expansion, the temperature of the gas

Question # 2

Boyle's law is applicable in

Question # 3

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

Question # 4

Melting point of ice

Question # 5

One mole of any substance contain

Question # 6

A heat engine is that which converts

Question # 7

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 8

According to kinetic theory of gases, molecules of a gas behave like

Question # 9

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

Question # 10

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 11

Good absorbers of heat are

Question # 12

For the working of a heat engine, there must be

Question # 13

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

Question # 14

The Boltzman constant has the value

Question # 15

Brownian motion increases due to

Question # 16

The internal energy of an ideal gas system is generally the

Question # 17

Pressure may be define as _______ per second per unit area:

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

Which of the following is a state variable

Question # 22

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 23

Pressure of a gas at constant volume is proportion to

Question # 24

At constant volume temperature is increased. Then

Question # 25

If an amount of heat enters the system it could

Question # 26

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

Question # 27

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 28

Which of the following is not an assumption of kinetic energy

Question # 29

In an adiabatic process the work is done at the expense of the

Question # 30

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
2 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
3 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
4 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
5 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
6 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
D. None of these
7 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
8 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
9 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
10 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point

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