Question # 1

A process which is carried at constant temperature and Boyle's law can be applied is called:

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Adiabatic process

Isothermal process

Isochoric process

None of these

Electromagnetic waves emitted by hot bodies are called:

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Photoelectrons

Alpha rats

Thermal radiation

None of these

No entropy change is associated with:

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Isothermal

Adiabatic process

Isobaric process

None of them

One degree of thermodynamics scale of temperature is called:

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Celsius

Fahrenheit

Kelvin

Radian

The equation W = ________𝜟U represents:

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Thermal process

adiabatic process

Isobaric process

None of these

The rate of change of momentum of a molecule is equal to:

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Pressure

Work

Density

Force

Real gases strictly obey gas laws at:

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High pressures and low temperatures

Low pressures and high temperatures

High pressures and & temperatures

None of these

When a gas is compressed:

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Its internal energy decreases

Its temperature decreases

Its temperature increases

None of these

The value of universal gas constant R is:

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8.314 J/K mole K

8314 J/ mole K

8.314 J/ mole K

None of these

According to boyle's law, volume of a given mass of a gas is

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Inversely proportional mass at constant pressure

Directly proportional to pressure at constant temprerature

Inversely proportional pressure at constant temprature

None of these

In which process, the change in internal energy of the system of zero:

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Isochoric process

isobaric process

Adiabatic process

Isothermal process

The equation PVr = Constant applies to:

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Isothermal process

Adiabatic process

Isobaric process

None of these

In the theory of dimensional analysis, heat may be properly represented by:

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ML²T^-2

MT^-2

ML^-1T^-1

None of these

The efficiency of a particle heat engine:

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can be 100%

Cannot be 100%

Is always zero

None of these

If P is the pressure and V is the volume, Then PV will represent:

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Power

Work

Force

None of these

The temperature scale approved in SI units is:

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Calslus scale

Kelvin scale

Fehrenhelt scale

None of these

If temperature of the sink is decreased, efficiency of a carnot engine.

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Remains constant

Decreases

Increases

None of these

While dealing with the processes i thermodynamics, the working substances is usually:

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Oxygen gas

Hydrogen gas

Ideal gas

None of these

The ideal gas obey gas law at:

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Low tempratures and high pressures

High temperatures and low pressures

All temperatures and pressures

None of these

The law of thermodynamics which discusses the condition under which heat energy is converted into and equivalent amount of work is:

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1st

2nd

3rd

None of these

Carnot cycle is:

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Reversible

Irreversible

Sometimes A, Sometimes B

None of these

Truth of kinetic energy theory is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

As the working substance of a heat engine completes a cycle, there is no change in:

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Internal energy

Pressure

Volume

All of these

At constant temperature, if the volume of a given mass of a gas is doubled, then the density of gas becomes:

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Double

Remains constant

Half

None of these

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

In which process the change in internal energy of the system is zero:

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Isochoric process

Isobaric process

Adiabatic process

Isothermal process

Number of spark plugs needed in diesel engine is:

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Four

Five

Six

None of these

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