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

One mole of any substance contain

Question # 2

One kilogram of different substances contain

Question # 3

The pressure exerted by the gas is

Question # 4

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

Question # 5

First law of thermodynamics is consequence of conservation of

Question # 6

In an ideal gas, the molecules have:

Question # 7

If the distance between two charges is doubled, the force between them will become:

Question # 8

Internal energy is the sum of all the forms of

Question # 9

Real gases strictly obey gas law at:

Question # 10

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 11

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

Question # 12

Adiabatic change occurs when the gas

Question # 13

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

Question # 14

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

Question # 15

The volume of universal gas constant R is:

Question # 16

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 # 17

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 18

The earliest heat engine was

Question # 19

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

Question # 20

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 21

Sadi carnot described an ideal heat engine in

Question # 22

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

Question # 23

Which of the following is a state variable

Question # 24

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 25

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 26

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 27

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

Question # 28

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

Question # 29

A heat engine is that which converts

Question # 30

Which quantity is important in stating the entropy of the system

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
2 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
3 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
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
4 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
5 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
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 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
8 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
9 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
10 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these

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