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 state in which ice, water and vapour coexists in equilibrium is called

Question # 2

Which of the following does not have the same units:

Question # 3

Maximum density of H2O is at the temperature

Question # 4

In an adiabatic expansion, the temperature of the gas

Question # 5

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 6

Absolute zero is considered as that temperature at which:

Question # 7

The earliest heat engine was

Question # 8

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

Question # 9

Carnot heat engine only used

Question # 10

A reversible cycle is the one in which

Question # 11

If an amount of heat enters the system it could

Question # 12

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

Question # 13

The basis to define a temperature scale that is independent of material properties is provided by

Question # 14

Boyle's law is applicable in

Question # 15

When two objects are rubbed together, their internal energy

Question # 16

The motion of molecules in gases is:

Question # 17

The ideal gas law is

Question # 18

The pressure exerted by the gas is

Question # 19

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 20

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 # 21

First law of thermodynamic is special case of

Question # 22

When heat is added into the system then change in entropy is

Question # 23

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 # 24

Efficiency of carnot engine is independent of the

Question # 25

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

Question # 26

The Boltzman constant has the value

Question # 27

A carnot cycle consists of

Question # 28

Rice takes longest to cook

Question # 29

During the whole carnot cycle

Question # 30

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
3 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
4 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
5 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
A. 300°C
B. 573°C
C. 600°C
D. 743°C
6 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
7 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
8 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
9 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
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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