1) Heat pump_______________________? a. Accomplishes only space heating in winter b. Accomplishes only space cooling in summer c. Accomplishes both A. and B d. Works on Carnot cycle
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2) For an ideal solution, the value of activity co-efficient is______________________? a. 0 b. 1 c. < 1 d. > 1
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3) Isentropic process means a constant _____________________ process ? a. Enthalpy b. Pressure c. Entropy d. None of these
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4) Entropy is a/an___________________? a. State function b. Macroscopic property c. Extensive property d. None of these
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5) If an ideal solution is formed by mixing two pure liquids in any proportion, then the ___________________ of mixing is zero? a. Enthalpy b. Volume c. Both A. & B. d. Neither A nor B
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6) The temperature at which both liquid and gas phases are identical, is called the _____________ point? a. Critical b. Triple c. Freezing d. Boiling
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7) Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will_________________? a. Increase b. Decrease c. Remain unchanged d. First fall and then rise
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8) Joule-Thomson co-efficient for a perfect gas is_____________________? a. Zero b. Positive c. Negative d. None of these
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9) Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be__________________? a. 580 b. 640 c. 1160 d. Data insufficient; can’t be computed
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10) In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by___________________? a. High temperature b. Low pressure c. Low temperature only d. Both low temperature and high pressure
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11) What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope ? a. 0 b. 2 c. 1 d. 3
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12) What is the value of ln y (where y = activity co-efficient) for ideal gases ? a. Zero b. Unity c. Infinity d. Negative
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13) Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________________? a. Calorific value b. Heat of reaction c. Heat of combustion d. Heat of formation
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14) For a single component two phase mixture, the number of independent variable properties are_________________? a. Two b. One c. Zero d. Three
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15) When a gas in a vessel expands, its internal energy decreases. The process involved is________________? a. Reversible b. Irreversible c. Isothermal d. Adiabatic
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16) The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is__________________? a. ∞ b. 1 c. 0 d. -ve
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17) Enthalpy ‘H’ is defined as___________________? a. H = E – PV b. H = F – TS c. H – E = PV d. None of these
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18) A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system________________? a. its internal energy (U) decreases and its entropy (S) increases b. U and S both decreases c. U decreases but S is constant d. U is constant but S decreases
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19) The chemical potential for a pure substance is ____________ its partial molal free energy? a. More than b. Less than c. Equal to d. Not related to
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20) The number of degrees of freedom at the triple point of water is__________________? a. 0 b. 1 c. 2 d. 3
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21) In a turbine, the fluid expands almost_________________? a. Isothermally b. Isobarically c. Adiabatically d. None of these
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22) Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________? a. Always greater than one b. Same at the same reduced temperature c. Same at the same reduced pressure d. Both B. & C
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23) The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the ____________ temperature? a. Critical b. Boyle c. Inversion d. Reduced
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24) Mollier diagram is a plot of___________________? a. Temperature vs. enthalpy b. Temperature vs. enthalpy c. Entropy vs. enthalpy d. Temperature vs. internal energy
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25) At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be________________? a. More b. Less c. Same d. More or less; depending on the system
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26) Equation which relates pressure, volume and temperature of a gas is called the__________________? a. Equation of state b. Gibbs Duhem equation c. Ideal gas equation d. None of these
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27) Which of the following is not correct for a reversible adiabatic process ? a. TVγ-1 = constant b. p1-γ.TY = constant c. PVγ = constant d. None of these
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