Question # 1

For making cooking utensils, which of the following pairs of properties is most suited?

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Low specific heat and high conductivity

Low specific heat and low conductivity

High specific heat and high conductivity

High specific heat and low conductivity

Absolute temperature can be calculated by

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Means squares velocity

Motion of the molecule

Both A and B

None of these

Absolute zero is considered as that temperature at which:

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All liquid become gases

All gases become liquid

Water freezes

None of these

When two objects are rubbed together, their internal energy

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remains same

decreases

remains the same then decreases

increases

If the distance between two charges is doubled, the force between them will become:

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Double

Half

Three times

One fourth

One third

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

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

The curve representing an isothermal process is called

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adiabat

isotherm

fixed temperature

none of them

The motion of molecules in gases is:

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Orderly

Random

Circular

All of these

In an adiabatic process the work is done at the expense of the

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energy supplied to the system

energy gained from the surroundings

internal energy

none of them

The unit of thermodynamical scale is

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centigrade

fahrenheit

kelvin

none of them

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

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

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N = nN_Am = MN_A

n = N N_A, M = mN_A

M = N_A/N , N_A= m/n

N = nN_A, M = mN_A

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 O° K which of the following properties of a gas will be zero?

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Kinetic energy

Potential energy

Vibrational energy

Density

In the formula P = N₀KT, N₀denotes:

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Number of molecules per unit per volume

Number of moles

Number of molecules

None of these

The value of E₀in coulomb's law is:

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9 x 10⁹Nm²C^-2

8.85 x 10^-12C²N^-1m^-2

8.85 x 10^-12Nm²C^-2

9 x 10⁹C²N^-1m^-2

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ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers

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