ECAT Pre Computer Science Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

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ECAT Physics Chapter 11 Heat & Thermodynamics

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Question # 1

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 2

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

Question # 3

We can express the work in term of

Question # 4

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

Question # 5

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 6

Adiabatic change occurs when the gas

Question # 7

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

Question # 8

Which quantity is important in stating the entropy of the system

Question # 9

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

Question # 10

At constant volume temperature is increased. Then

Question # 11

A heat engine is that which converts

Question # 12

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 13

No spark plug is needed in

Question # 14

Good absorbers of heat are

Question # 15

In the reverse process, the working substance passes through the same stages as in the direct process and

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
2 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
3 In the reverse process, the working substance passes through the same stages as in the direct process and
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
4 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
5 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
6 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
7 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
8 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
9 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
10 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None

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