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

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 2

Pressure of a gas at constant volume is proportion to

Question # 3

Rice takes longest to cook

Question # 4

Internal energy is the sum of all the forms of

Question # 5

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 # 6

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 7

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 8

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

Question # 9

When two objects are rubbed together, their internal energy

Question # 10

Maximum density of H2O is at the temperature

Question # 11

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

Question # 12

In thermodynamics, internal energy is the function of

Question # 13

Rate of diffusion is

Question # 14

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

Question # 15

The temperature of gas is produced by

Question # 16

A process is a reversible process, if the entropy of the system

Question # 17

The value of E0in coulomb's law is:

Question # 18

We cannot utilize the heat contents of oceans and atmosphere because

Question # 19

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

Question # 20

A heat engine is that which converts

Question # 21

A carnot cycle consists of

Question # 22

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

Question # 23

An isochoric process is one which take place at

Question # 24

Brownian motion increases due to

Question # 25

Which of the following is not an example of adiabatic process

Question # 26

Average KE of a gas molecule has:

Question # 27

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

Question # 28

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 29

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

Question # 30

A diatomic gas molecule has

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The volume of universal gas constant R is:
A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
2 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:
A. Force
B. Density
C. Work done
D. Pressure
3 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none 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 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
6 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
7 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
8 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
9 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
10 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity

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