Question # 1

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

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very high temperature

very low temperature

any one of them

none of them

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

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

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1.7 x 10³J

10.2 x 10³J

3..4 x 10³J

6.8 x 10³J

Which of the following is a state variable

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entropy

pressure

volume

all of them

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

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

Which of the following is not an assumption of kinetic energy

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a finite volume of gas consists of very large number of molecules

the gas molecules are in random motion

collision between the gas molecules are inelastic

the size of the gas molecules is much smaller than the separation between molecules

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

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heat capacity

specific heat capacity

specific heat at constant volume

specific heat at constant pressure

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

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546 K

273 K

546°C

273°C

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

While deriving equation of pressure by kinetic theory of gases, we take into account:

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Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

Generally a temperature scale is established by

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one fixed point

two fixed point

three fixed point

four fixed point

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

The efficiency of diesel engine is

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25%

25 - 30%

35%

35 - 40%

At absolute temperature, the kinetic energy of the molecules

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Becomes zero

Becomes maximum

Becomes minimum

Remain constant

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

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

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maximum

zero

minimum

not fixed

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

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

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

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

Good absorbers of heat are

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Poor emitters

Non emitters

Good emitters

Highly polarized

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

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Newton's second law

Pascal's law

Carnot theorem

Second law of thermodynamics

The basis to define a temperature scale that is independent of material properties is provided by

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carbon cycle

nitrogen cycle

Carnot cycle

irreversible cycle

Carnot heat engine only used

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isothermal processes

adiabatic processes

both of them

none of them

In the reverse process, the working substance passes through the same stages as in the direct process and

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thermal effects at each stage are exactly reversed

mechanical effects at each stage are exactly reversed

thermal and mechanical effects at each stage remain the same

thermal and mechanical effects at each stage are exactly reversed

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 curve representing an isothermal process is called

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adiabat

isotherm

fixed temperature

none of them

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

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

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Clausius statement of second law

Kelvin'sstatement of second law

Clausius statement of first law

Kelvin's statement of first law

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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