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

Which of the following is not thermo dynamical function?

Question # 2

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 # 3

The efficiency of diesel engine is

Question # 4

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

Question # 5

Internal energy is the sum of all the forms of

Question # 6

The absolute temperature for an ideal gas is

Question # 7

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

Question # 8

One kilogram of different substances contain

Question # 9

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

Question # 10

Pressure of a gas at constant volume is proportion to

Question # 11

Which of the following is not an example of adiabatic process

Question # 12

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

Question # 13

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

Question # 14

In the formula P = N0KT, N0denotes:

Question # 15

Real gases strictly obey gas law at:

Question # 16

The product of the pressure and volume of an ideal gas is

Question # 17

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

Question # 18

In an adiabatic process the work is done at the expense of the

Question # 19

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 20

The Boltzman constant has the value

Question # 21

Efficiency of carnot engine is independent of the

Question # 22

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

Question # 23

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 24

Which of the following is not an assumption of kinetic energy

Question # 25

If the formula PV = nRT, n denotes:

Question # 26

Absolute temperature can be calculated by

Question # 27

Electromagnetic waves emitted by hot bodies are called:

Question # 28

A reversible cycle is the one in which

Question # 29

The concept of entropy was introduced into the study of thermodynamics in

Question # 30

A real gas can be approximated to an ideal gas at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
2 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
3 If water in a closed bottle is taken up to the moon and opened, the water gets
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
4 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
5 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
6 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
7 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
8 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
9 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
10 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None

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