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

The bicycle pump provides a good example of

Question # 2

Energy gas behaves like an ideal gast at

Question # 3

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 4

The ideal gas law is

Question # 5

Heat travels through vacuum by

Question # 6

Which of the following is not an example of adiabatic process

Question # 7

At absolute temperature, the kinetic energy of the molecules

Question # 8

Carnot heat engine only used

Question # 9

The absolute temperature for an ideal gas is

Question # 10

If the formula PV = nRT, n denotes:

Question # 11

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

Question # 12

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

Question # 13

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 # 14

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

Question # 15

Efficiency of carnot engine is independent of the

Question # 16

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 17

On colliding in a closed container, the gas molecules

Question # 18

When two objects are rubbed together, their internal energy

Question # 19

In thermodynamics, internal energy is the function of

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

Good absorbers of heat are

Question # 24

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 25

Electromagnetic waves emitted by hot bodies are called:

Question # 26

Brownian motion increases due to

Question # 27

Adiabatic change occurs when the gas

Question # 28

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 29

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

Question # 30

The absolute temperature of the tripple point of water is

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Sr.# Question Answer
1 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
2 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
3 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
4 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
5 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
6 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
7 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
8 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
9 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
10 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these

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