Thermodynamics for Chemical Quiz 1

1 / 50

**1st law of thermodynamics is nothing but the law of conservation of_____?**

2 / 50

**_____ does not change during phase transformation processes like sublimation, melting & vaporisation?**

3 / 50

**A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by__________?**

4 / 50

**A domestic refrigerator has a/an _____ cooled condenser?**

5 / 50

**?When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.? This is called the________?**

6 / 50

**________ increases with increase in pressure?**

7 / 50

**?At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero?. This follows from the ___________?**

8 / 50

**A gas performs the maximum work, when it expands_____?**

9 / 50

**A system in which there is exchange of energy but not of mass, is called a/an _____ system?**

10 / 50

**?If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them?. This is _______ law?**

11 / 50

**_____ does not change during phase transformation processes like sublimation, melting & vaporisation?**

12 / 50

**?The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances?. This is the__________?**

13 / 50

**A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect ?**

14 / 50

**A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is_________?**

15 / 50

**A refrigerator works on the principle of ______ law of thermodynamics?**

16 / 50

**?The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture?. This is___________?**

17 / 50

**(?T/?P)H is the mathematical expression for___________?**

18 / 50

**A liquid under pressure greater than its vapour pressure for the temperature involved is called a ______ liquid?**

19 / 50

**(?E/?T)V is the mathematical expression for______?**

20 / 50

**______ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low?**

21 / 50

**______ law of thermodynamics ascertains the direction of a particular spontaneous process?**

22 / 50

**?Dry ice? is_________?**

23 / 50

**_______ Equation predicts the activity co-efficient from experimental data ?**

24 / 50

**A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system is_______?**

25 / 50

**A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is ?i yi P = Yi xifi? where, ? is a vapor fugacity component, Yi is the liquid activity coefficient and fi? is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ________?**

26 / 50

**A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount?. This is__________?**

27 / 50

**(?H/?T)P is the mathematical expression for______?**

28 / 50

**(1/V) (?V/?T)P is the mathematical expression___________?**

29 / 50

**?Law of corresponding states? says that_____?**

30 / 50

**A change in state involving a decrease in entropy can be spontaneous, only if ______?**

31 / 50

**________ functions are exemplified by heat and work ?**

32 / 50

**A large iceberg melts at the base, but not at the top, because of the reason that__________?**

33 / 50

**A Carnot cycle consists of the following steps ?**

34 / 50

**A system is said to be at equilibrium, if the entropy of the system has reached _____ value?**

35 / 50

**A refrigerator may be termed as a______?**

36 / 50

**_________ decreases during adiabatic throttling of a perfect gas?**

37 / 50

**1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be ?**

38 / 50

**A gas can be liquefied by pressure alone only, when its temperature is ______ its critical temperature?**

39 / 50

**Absolute zero temperature signifies the ______?**

40 / 50

**A/an _____ system is exemplified by a vessel containing a volatile liquid in contact with its vapor?**

41 / 50

**A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300?C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is__________?**

42 / 50

**A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0?C, 760 mm Hg) will be ______ litres?**

43 / 50

**1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be ?**

44 / 50

**A gas shows deviation from ideal behaviour at_______?**

45 / 50

**A refrigeration cycle is the same as a ______ cycle?**

46 / 50

**_____ explains the equilibrium constant for any chemical reaction?**

47 / 50

**A solid is transformed into vapour without going to the liquid phase at__________?**

48 / 50

**A system is said to be isopiestic, if there is no _______ change?**

49 / 50

**4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is__________?**

50 / 50

**A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the ______ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively) ?**

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