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 ideal gas law is

Question # 2

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

Question # 3

During the whole carnot cycle

Question # 4

No spark plug is needed in

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

In the formula P = N0KT, N0denotes:

Question # 9

Melting point of ice

Question # 10

Boyle's law is applicable in

Question # 11

At absolute temperature, the kinetic energy of the molecules

Question # 12

We cannot utilize the heat contents of oceans and atmosphere because

Question # 13

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

Question # 14

Pressure exerted by a gas is

Question # 15

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 # 16

Which of the following does not have the same units:

Question # 17

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 # 18

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 19

An isochoric process is one which take place at

Question # 20

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

Question # 21

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

Question # 22

A carnot cycle consists of

Question # 23

A succession of events which bring the system back to its initial condition is called

Question # 24

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 # 25

The pressure exerted by the gas is

Question # 26

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 27

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 # 28

Rate of diffusion is

Question # 29

The Boltzman constant has the value

Question # 30

In an ideal gas, the molecules have:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
4 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
5 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
6 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
7 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
8 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
9 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
10 Which of the following is not an example of adiabatic process
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them

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