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

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

In a heat engine, heat is supplied by the

Question # 6

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

Question # 7

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

Question # 8

Energy gas behaves like an ideal gast at

Question # 9

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

Question # 10

In the formula P = N0KT, N0denotes:

Question # 11

The absolute temperature of the tripple point of water is

Question # 12

The process which is carried out at constant temperature is known as

Question # 13

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

Question # 14

Triple point of water is

Question # 15

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 16

A diatomic gas molecule has

Question # 17

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

Question # 18

Pressure exerted by a gas is

Question # 19

An isochoric process is one which take place at

Question # 20

In the study of thermodynamics, which gas is considered as the working substance

Question # 21

When heat is removed from the system

Question # 22

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 23

Good absorbers of heat are

Question # 24

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

Question # 25

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

Question # 26

The only significant motion possessed by the mono-atomic gas represented is:

Question # 27

A carnot cycle consists of

Question # 28

Which of the following is not an example of adiabatic process

Question # 29

At absolute temperature, the kinetic energy of the molecules

Question # 30

The curve representing an isothermal process is called

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
2 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
3 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
4 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
5 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
6 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
7 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
8 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
9 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
10 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these

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