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The first law of thermodynamics, isothermal and adiabatic processes Mock Test for JEE

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Part of Thermodynamics in JEE Main Physics.

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Q1PhysicsUnit 8: Thermodynamics

The amount of work done by the gas system in increasing the volume of 10 mols of an ideal gas from one litre to 20 litres at

0^{0}

C will be

Q2PhysicsUnit 8: Thermodynamics

One mole of an ideal gas u ndergoes a process:

P=\frac{P_{0}}{1+\left(V_{0} / V\right)^{2}}

Here

P_{0}

and

V_{0}

are constants.change in temperature of the gas when volume is changed from

V=V_{0}

V=2 V_{0}

is:

Q3PhysicsUnit 8: Thermodynamics

In a certain process 500 cal of heat is given to a system and the system does

100 J

of work. The increase in internal energy of the system is

Q4PhysicsUnit 8: Thermodynamics

If a gas is compressed adiabatically by doing work of

150 \mathrm{J}

, the change in the internal energy of the gas is:

Q5PhysicsUnit 8: Thermodynamics

The change in internal energy of a system depends on

Q6PhysicsUnit 8: Thermodynamics

Which of the following options is the only correct representation of a process in which

\Delta U=\Delta Q-P \Delta V ?

Q7PhysicsUnit 8: Thermodynamics

A cyclic process is shown in the figure.Work done during isobaric expansion is:

Q8PhysicsUnit 8: Thermodynamics

When an ideal gas expands isothermally, its internal energy will

Q9PhysicsUnit 8: Thermodynamics

Assertion For an ideal gas in a cyclic process and in an isothermal process change in internal energy is zero. Reason In both processes there is no change in temperature.

Q10PhysicsUnit 8: Thermodynamics

Assertion: P-V graph (at constant temperature) for ideal gas is rectangular parabola Reason: Ideal gas obeys Charle's law

Q11PhysicsUnit 8: Thermodynamics

A litre of dry air at STP expands adiabatically to a volume of 3 litres. If

\gamma=1.40,

the work done by air is:

\left(3^{1.4}=4.6555\right)

[Take air to be an ideal gas

]

Q12PhysicsUnit 8: Thermodynamics

In isothermal expansion the pressure is determined by :

Q13PhysicsUnit 8: Thermodynamics

slowly neated tIII all the mercury spılls over

P_{a t m}=76 \mathrm{cm}

of Hg column Statement 1: The temperature of gas continuously increases. Statement 2: According to first law of thermodynamics

d Q=d U+d W

where symbols have their usual meaning.

Q14PhysicsUnit 8: Thermodynamics

During one cycle of a heat engine 2000 calories of heat is supplied and 1500 calories rejected. The amount of work done equals:

Q15PhysicsUnit 8: Thermodynamics

A cyclic heat engine does

50 \mathrm{kJ}

of work per cycle. If efficiency of engine is

75 \%

the heat rejected per cycle will be:

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