Question # 1

A carnot cycle consists of

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One step

two step

three steps

four steps

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

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how heat is absorbed

how heat extracted

how this conversion takes place

none of them

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

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

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2

3

5

6

If water in a closed bottle is taken up to the moon and opened, the water gets

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Freeze

Boiled

Dissociated into O₂and H₂

Evaporated

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

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81 K

355 K

627 K

627°C

If a liquid is heated in weightlessness, the heat is transmitted through

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Conduction

Convection

Radiation

Neither, because the liquid cannot be heated in weightlessness

Good absorbers of heat are

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Poor emitters

Non emitters

Good emitters

Highly polarized

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

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real gas

ideal gas

any gas may be ideal or real

none of them

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

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Double

Remains constant

Half

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

A diatomic gas molecule has

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translational energy

rotaional energy

vibrational energy

all of them

The temperature scale approved in SI units is:

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Celsius scale

Kelvin scale

Fehrenheit scale

None of these

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

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A greater than than of B

A is equal to that of B

A is less than that of B

A is twice the pressure of B

In which process the condition for the application of Boyle's law on the gas is fulfilled

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isochoric process

adiabatic process

isothermal process

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

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