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

At absolute temperature, the kinetic energy of the molecules

Question # 2

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

Question # 3

A heat engine is that which converts

Question # 4

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

Question # 5

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

Question # 6

The ideal gas law is

Question # 7

Generally a temperature scale is established by

Question # 8

Rate of diffusion is

Question # 9

Brownian motion increases due to

Question # 10

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

Question # 11

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

Question # 12

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 # 13

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 # 14

The internal energy of an ideal gas system is generally the

Question # 15

A real gas can be approximated to an ideal gas at

Question # 16

The example of irreversible process is

Question # 17

Boyle's law is applicable in

Question # 18

First law of thermodynamic is special case of

Question # 19

Energy gas behaves like an ideal gast at

Question # 20

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:

Question # 21

Pressure may be define as _______ per second per unit area:

Question # 22

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

Question # 23

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 24

Maximum density of H2O is at the temperature

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

The motion of molecules in gases is:

Question # 29

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 30

Melting point of ice

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
2 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
3 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
4 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
5 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
A. A greater than than of B
B. A is equal to that of B
C. A is less than that of B
D. A is twice the pressure of B
6 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
7 Carnot heat engine only used
A. isothermal processes
B. adiabatic processes
C. both of them
D. none of them
8 The concept of entropy was introduced into the study of thermodynamics in
A. 1856
B. 1865
C. 1656
D. 1685
9 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
10 The basis to define a temperature scale that is independent of material properties is provided by
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle

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