Heat & Thermodynamics MCQs with Answers

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When a gas in a fixed-volume container is heated, its molecules gain kinetic energy and move faster.

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Evaporation of water in shade is generally slow because lower temperatures and reduced air movement decrease the rate of evaporation.

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A black body is an ideal radiator that radiates equally at all wavelengths.

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Alcohol is the liquid used in a laboratory thermometer.

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The value of Charles's law constant A depends upon All of these — mass, pressure, and nature of the gas.

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Heat transfers from a hotter area to a colder area through a conductor by the process of conduction.

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ΔH can be measured indirectly by applying Hess's law, which states that the total enthalpy change of a reaction is independent of the pathway taken.

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For an ideal gas, the potential energy associated with the molecule is zero because ideal gas molecules have no intermolecular forces of attraction.

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The mathematical expression PV = K represents Boyle's law, which states that pressure and volume of a gas are inversely proportional at constant temperature.

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The process by which a gas turns into a liquid is called condensation.