Q. The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

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Q. In jet refrigerators, the refrigerating fluid is practically always

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Q. Water on heating from 1 to 4°C

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Q. Pick out the correct statement.

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Q. Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.

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Q. Internal energy change of a system over one complete cycle in a cyclic process is

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Q. Heating of water under atmospheric pressure is an __________ process.

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Q. Van Laar equation deals with the activity co-efficients in

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Q. High __________ is an undesirable property for a good refrigerant.

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Q. Which of the following is not an intensive property ?

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Q. Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?

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Q. Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.

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Q. The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is

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Q. Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.

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Q. Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the

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Q. Entropy is a measure of the __________ of a system.

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Q. A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is

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Q. Fundamental principle of refrigeration is based on the __________ law of thermodynamics.

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Q. For a spontaneous process, free energy

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Q. Equilibrium constant decreases as the temperature

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