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 motion of molecules in gases is:

Question # 2

Which of the following is not an assumption of kinetic energy

Question # 3

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

Question # 4

The absolute temperature of the tripple point of water is

Question # 5

An isochoric process is one which take place at

Question # 6

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

Question # 7

Which of the following is not an example of adiabatic process

Question # 8

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

Question # 9

Which of the following is a state variable

Question # 10

Sadi carnot described an ideal heat engine in

Question # 11

In an adiabatic expansion, the temperature of the gas

Question # 12

On colliding in a closed container, the gas molecules

Question # 13

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 # 14

Energy gas behaves like an ideal gast at

Question # 15

The relationship between Boltzmann constant k with R and NAis given as:

Question # 16

According to the second law, which is must to produce work

Question # 17

Pressure of a gas at constant volume is proportion to

Question # 18

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

Question # 19

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

Question # 20

Which of the following is not thermo dynamical function?

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Carnot heat engine only used

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

If an amount of heat enters the system it could

Question # 29

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

Question # 30

Melting point of ice

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
3 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
4 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
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 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
7 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
8 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
9 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
10 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %

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