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

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

Question # 2

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

Question # 3

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 4

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 5

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

Question # 6

Maximum density of H2O is at the temperature

Question # 7

When heat is added into the system then change in entropy is

Question # 8

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 # 9

Carnot heat engine only used

Question # 10

Melting point of ice

Question # 11

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

Question # 12

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

Question # 13

Rate of diffusion is

Question # 14

The absolute temperature for an ideal gas is

Question # 15

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

Question # 16

The example of reversible process is

Question # 17

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

Question # 18

Average KE of a gas molecule has:

Question # 19

Brownian motion increases due to

Question # 20

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 21

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

Question # 22

The disorder in the system increases due to the

Question # 23

In an ideal gas, the molecules have:

Question # 24

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 25

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

Question # 26

The Boltzman constant has the value

Question # 27

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

Question # 28

In a heat engine, heat is supplied by the

Question # 29

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 30

Good absorbers of heat are

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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 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
3 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
4 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
5 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
6 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
7 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
8 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
9 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
10 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

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