Question # 1

We can express the work in term of

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directly measurable variables

indirectly measurable variables

either of them

both of them

A process in which no heat enters or leaves the system is called

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isochoric process

isothermal process

adiabatic process

none of them

The curve representing an isothermal process is called

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adiabat

isotherm

fixed temperature

none of them

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

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maximum

zero

minimum

not fixed

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

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P=P/V<1/2mv²>

P=2N/V<1/2mv²>

P=2/3N/V<1/2mv²>

P=2/3N/V<mv²>

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

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positive

negative

zero

any one of them

A real gas can be approximated to an ideal gas at

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Low density

High pressure

High density

Low temperature

Pressure of a gas at constant volume is proportion to

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Total energy of gas

Average P.E to molecules

Average K.E of molecules

Total internal energy of gas

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

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1856

1865

1656

1685

The relationship between Boltzmann constant k with R and N_Ais given as:

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k = RN_A

k =R/N_A

k = NR/N_A

None of these

At constant volume temperature is increased. Then

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Collision on walls will be less

Number of collisions per unit time will increase

Collision will be in straight lines

Collision will not change

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

On colliding in a closed container, the gas molecules

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Transfer momentum to the walls

Momentum becomes zero

Move in opposite directions

Perform Brownian motion

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

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

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2V

3V

0.5V

V

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

Energy gas behaves like an ideal gast at

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High temperature and low pressure

Low temperature and high pressure

Both A and B

None

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

The unit of thermodynamical scale is

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centigrade

fahrenheit

kelvin

none of them

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