Question # 1

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

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

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reversible process

irreversible process

a cycle

none of them

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

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2

3

5

6

The absolute temperature for an ideal gas is

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directly proportional to the rotational K.E of gas molecules

directly proportional to the vibrational K.E of gas molecules

directly proportional to the average translational K.E.of gas molecules

directly proportional to the P.E. of gas molecules

A typical four stroke petrol engine undergoes how many successive processes in each cycle

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one

two

three

four

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

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0 J

2 J

5 J

10 J

At what temperature the adiabatic change is equivalent to the isothermal change?

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Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

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

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

The work done by the system on its environment is considered as

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positive

negative

zero

any one of them

Adiabatic change occurs when the gas

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expands

compressed

expands or compressed

expands or compressed rapidly

Which of the following is a state variable

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entropy

pressure

volume

all of them

The unit of thermodynamical scale is

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centigrade

fahrenheit

kelvin

none of them

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:

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Force

Density

Work done

Pressure

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

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Ideal gas

Inert gas

Real gas

None of these

The internal energy of an ideal gas system is generally the

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translational K.E of molecules

vibrational K.E of molecules

rotational K.E of molecules

all of them

The volume of universal gas constant R is:

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8.314 J/K mole K

8314 J/K mole K

8.314 J/mole K

None of these

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