ECAT Pre General Science Chapter 11 online mcq test with answers for Physics chapter 11 (Heart & Thermodynamics)

ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics Online Test

Try the ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics Online Test.

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics Online Test

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Question # 1

Truth of kinetic energy is confirmed by:

Diffusion of gases A
Brownian motion B
Both A and B C
None of these D

Question # 2

The example of irreversible process is

slowly liquification A
slowly evaporation B
an explosion C
all of them D

Question # 3

In thermodynamics, internal energy is the function of

temperature A
pressure B
state C
none of them D

Question # 4

The pressure exerted by the gas is

directly proportional to the P.E A
inversely proportional to the P.E B
inversely proportional to the K.E C
directly proportional to the K.E D

Question # 5

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

P=P/V<1/2mv²> A
P=2N/V<1/2mv²> B
P=2/3N/V<1/2mv²> C
P=2/3N/V<mv²> D

Question # 6

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

300°C A
573°C B
600°C C
743°C D

Question # 7

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

Low specific heat and high conductivity A
Low specific heat and low conductivity B
High specific heat and high conductivity C
High specific heat and low conductivity D

Question # 8

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

Double A
Half B
Three times C
One fourth D
One third E

Question # 9

Pressure of a gas at constant volume is proportion to

Total energy of gas A
Average P.E to molecules B
Average K.E of molecules C
Total internal energy of gas D

Question # 10

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

adiabatically A
isothermally B
isochorcally C
isobarically D

Question # 11

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Metal has high specific heat A
Metal has high thermal conductivity B
Metal has low specific heat C
Metal has low thermal conductivity D

Question # 12

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

Only linear motion of molecules A
Only rotational motion B
Only vibratory motion C
All of these D

Question # 13

The process which is carried out at constant temperature is known as

adiabatic process A
isothermal process B
isochoric process C
none of them D

Question # 14

The motion of molecules in gases is:

Orderly A
Random B
Circular C
All of these D

Question # 15

Which quantity is important in stating the entropy of the system

initial entropy A
final entropy B
change in entropy C
none of them D

Question # 16

The ideal gas law is

P = nRT A
V = nRT B
PV =RT C
PV =nRT D

Question # 17

The behaviour of gases is well accounted by the kinetic theory based on

microscopic approach A
macroscopic approach B
both of them C
none of them D

Question # 18

We can express the work in term of

directly measurable variables A
indirectly measurable variables B
either of them C
both of them D

Question # 19

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

very high temperature A
very low temperature B
any one of them C
none of them D

Question # 20

Heat travels through vacuum by

Conduction A
Convection B
Radiation C
Both A and B D

Question # 21

Rice takes longest to cook

In a submarine 100 m below the surface of the sea A
At sea level B
At Murree C
At Mount Everest D

Question # 22

An isochoric process is one which take place at

Constant internal energy A
Constant entropy B
Constant volume C
Constant pressure D

Question # 23

The Boltzman constant has the value

1.38 x 10^-23JK^-1 A
1.28 x 10^-23JK^-1 B
1.38 x 10^-26JK^-1 C
1.28 x 10^-26JK^-1 D

Question # 24

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

35 %` A
40 % B
35 - 40 % C
25 % D

Question # 25

Which of the following does not have the same units:

Work A
Heat B
Kinetic energy C
Power D

Question # 26

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

2.0 x 10^-5/°C A
4.0x10^-5/°C B
6.0x10^-5/°C C
2.33x10^-5/°C D

Question # 27

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

Specific heat A
Water equivalent B
Thermal capacity C
Entropy D

Question # 28

In an ideal gas, the molecules have:

Kinetic energy only A
Potential energy only B
Both KE and PE C
None of these D

Question # 29

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

0°C A
10°C B
17°C C
20°C D

Question # 30

If the formula PV = nRT, n denotes:

Number of molecules per unit volume A
Number of moles B
Number of molecules C
None of these D

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ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer for Physics chapter 11 (Heart & Thermodynamics)

ECAT Pre General Science Physics Chapter 11 Test

ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics Online Test

ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics Online Test

Truth of kinetic energy is confirmed by:

The example of irreversible process is

In thermodynamics, internal energy is the function of

The pressure exerted by the gas is

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

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

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

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

Pressure of a gas at constant volume is proportion to

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

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

The process which is carried out at constant temperature is known as

The motion of molecules in gases is:

Which quantity is important in stating the entropy of the system

The ideal gas law is

The behaviour of gases is well accounted by the kinetic theory based on

We can express the work in term of

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Heat travels through vacuum by

Rice takes longest to cook

An isochoric process is one which take place at

The Boltzman constant has the value

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

Which of the following does not have the same units:

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

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

In an ideal gas, the molecules have:

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

If the formula PV = nRT, n denotes:

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