PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 An equilibrium the free energy change delta F for a reaction is. Maximum Minimum Zero Negative
2 Which of the following statements is not related with chemical equilirbium. The properties of the system become constant The equilibrium can be approached from either direction The chemical equilibrium is static is nature A catalyst can hasten the approach towards equilibrium
3 Which of the following properties of a system does not change in a state of equilibrium. Density Pressure Colour All above properties
4 The statement that heat cannot flow spontaneously from a colder to a hotter body is the result of. The first law of thermodynamics The second law of thermodynamics The third law of thermodynamics Henry's law
5 Which of the following makes the motion of perpetual motion machine a physical impossibility. First law of thermodynamics Second law of thermodynamics Third law of thermodynamics The Boltzmann law
6 In an adiabatic system, if work in done, the temperature must. Increase Decrease Remain the same Increase than decrease
7 Which of the following has the bighest value. Transnational partition function Rotational partition function Vibrational partition function Electronic partition function
8 In statistical mechanics, there exists a function which contains all the information about a macroscopic system. This function is known as. Eigen function Wave function Partition function Distribution function
9 The link between classical thermodynamics and quantum mechanics is prevented by Statiatical mechanics Boltzmann law Wave mechanics Matrix mechanics
10 The change of chemical potential of any component with temperature an constant P and composition, is euqal to. Partial molar enthalpy of that component Partial molar volume Partial molar free energy Negative of the partial molar entropy
11 Which of the following is the statement of third law of thermodynamics. Entroy of perfectly crystalline substance is zero at T = 0 Entropy of a perfectly crystaline substance is zero at standard state conditions Entropy and enthalpy of a substance become equal at T = 0 Free energy of a crystalline substance is zero at T = 0
12 The entropy change accompanying any physical or chemical transformation approaches zero as T approaches zero. This statement refers to. Helmholtz law Third law of thermodynamics Second law of thermodynamics Nernat heat theorem
13 Which law of thermodynamics helps in calculating the absolute entropies of varies substances. Zeroth law 1st law Second law Third Law
14 All naturally occurring processes spontaneously in a direction leads to. Decrease of entropy Increase of entropy Decrease in free energy Increase in free energy
15 At constant temperature and pressure, the decrease in Gibbs free energy (F) in equal to Increase in entropy Decrease in entropy Reversible work done by the system All types of work except the work of expansion
16 At constant temperature , the decrease in Halmholts free energy is equal to. Decrease in entropy Increase in entropy Reversible work done by the system All types of work done
17 Which of the following statements is not related with entropy. It is a measure of disorder It is a measure of unavailable energy It is a function of thermodynamics probability It is a path function
18 The entropy of the universe Tends towards a maximum Tend towards a maximum Tends to be zero Remains constatn
19 All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the. Carnot cycle Carnot theorem Narnst theorem Second law of thermodynamics
20 The efficiency of a reversible heat engine depends only on the Temperature of the heat sink Temperature of the heat source Temperature of the heat source and sink Pressure of the fluid
21 Which of the following process is not related with cannot cycle. Iso thermal expansion Adiabatic expansion Isothermal compression Isobaric compression
22 The overall energy change during the Cannot cycle to. Equal to zero Equal to Q Equal to W Maximum
23 Which of the following statements is not correct with respect to second law of thermodynamics. It helps in know the position of chemical equilibrium It helps to know the position of chemical equilibrium It determines the conversion of heat into work It is based on Nerst heat theorem
24 When two bodies have equality of temperature with a 3rd body they in turn have equality of temperature with each other. This is a statement of. First law of thermodynamics Zeroth law of thermodynamics Second law of thermodynamics Third law of thermodynamics
25 Regarding the internal energy of the molecules, which one of the following statements in not correct. It is the sum of vibration rotational and electronic energy It is a path function It is a state function It is an exact differential
26 Which of the following enthalpies is always negative. Enthalpy of melting Enthalpy of combustion Enthalpy of solution Enthalpy of formation
27 Which of the following reactions have small enthalpy change. NaOH with HCl NaOH with CH3 COOH HCl with NH4 OH None of these
28 The variation of enthalpy of reaction with temperature is given by. Hesse's law Clasisus Clapayron equation Kirchoffs equation Arrhenious equation.
29 Which of the following statements is not related with joule Thomson effect. Joule Thomson is 0 isenthalpic in nature H2 and He show heating effect All gases show change in temperature The change in temperature depends on initial temperature and nature of the gas. Joule Thomson coefficient is defined as meo= (op/oT)H
30 Which of the following is always true for the adiabatic expansion of gas. Temperature rises Pressure rises W=0 Q = 0
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