ECAT Pre Computer Science Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

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ECAT Physics Chapter 11 Heat & Thermodynamics

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Question # 1

The absolute temperature for an ideal gas is

Question # 2

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

Question # 3

In the formula P = N0KT, N0denotes:

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

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 6

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

Question # 7

Rice takes longest to cook

Question # 8

Adiabatic change occurs when the gas

Question # 9

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 10

Which of the following is a state variable

Question # 11

First law of thermodynamics is consequence of conservation of

Question # 12

Sadi carnot described an ideal heat engine in

Question # 13

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

Question # 14

Real gases strictly obey gas law at:

Question # 15

The earliest heat engine was

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none 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 If an amount of heat enters the system it could
A. decrease the internal energy
B. not change the internal energy
C. increase the internal energy
D. none of them
4 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
5 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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
6 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
7 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
8 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
9 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
10 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them

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