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Temperature is a measurement of coldness or hotness of an object. This definition is based on
(a)Zeroth law of thermodynamics.
(b)First law of thermodynamics.
(c)Second law of thermodynamics.
(d)Newton's law of cooling.

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Important Questions on Kinetic Theory of Gases and Radiation
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A system is neither in thermal equilibrium with nor with . The systems and :

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Pressure versus temperature graph of an ideal gas is as shown in figure. Density of the gas at point is . Density at point will be:

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If denote respectively the heat added, change in internal energy and the work done in a closed cycle process, then,

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Assertion: Thermodynamic processes in nature are irreversible.
Reason: Dissipative effects cannot be eliminated.

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Assertion: In an isolated system, the entropy increases.
Reason: The processes in an isolated system are adiabatic.
