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

Triple point of water is

Question # 2

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

Question # 3

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 # 4

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

Question # 5

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 # 6

The second law of thermodynamics is concerned with the circumstances in which

Question # 7

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

Question # 8

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 9

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

Question # 10

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

Question # 11

The internal energy of an ideal gas system is generally the

Question # 12

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 13

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 14

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

Question # 15

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

Question # 16

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 17

Which of the following does not have the same units:

Question # 18

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

Question # 19

If the volume of the gas is to be increased by 4 times, then

Question # 20

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

Question # 21

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

Question # 22

We can express the work in term of

Question # 23

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

Question # 24

The volume of universal gas constant R is:

Question # 25

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 26

In all natural processes where heat flows from one system to another, there is always a net

Question # 27

Generally a temperature scale is established by

Question # 28

Rice takes longest to cook

Question # 29

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 30

Truth of kinetic energy is confirmed by:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
2 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
3 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
4 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
5 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
6 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
7 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
8 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
9 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
10 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

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