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

Electromagnetic waves emitted by hot bodies are called:

Question # 2

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

Question # 3

The disorder in the system increases due to the

Question # 4

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 # 5

The efficiency of diesel engine is

Question # 6

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 7

At constant volume temperature is increased. Then

Question # 8

On colliding in a closed container, the gas molecules

Question # 9

The example of reversible process is

Question # 10

While deriving the equation for pressure of a gas we consider the

Question # 11

The basis to define a temperature scale that is independent of material properties is provided by

Question # 12

A real gas can be approximated to an ideal gas at

Question # 13

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

Question # 14

Internal energy is the sum of all the forms of

Question # 15

Energy gas behaves like an ideal gast at

Question # 16

In thermodynamics, internal energy is the function of

Question # 17

A process in which no heat enters or leaves the system is called

Question # 18

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

Question # 19

Pressure of a gas at constant volume is proportion to

Question # 20

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

Question # 21

The ideal gas law is

Question # 22

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

Question # 23

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

Question # 24

In case of an ideal gas, the P.E associated with its molecule is

Question # 25

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 26

Adiabatic change occurs when the gas

Question # 27

The internal energy of an ideal gas system is generally the

Question # 28

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 29

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

Question # 30

Which of the following is not an assumption of kinetic energy

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
2 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
3 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
4 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
5 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
6 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
7 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
8 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
9 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
10 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them

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