PPSC Chemistry Part I Physical Chemistry Online Test With Answers

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PPSC Chemistry Part I Physical Chemistry Online Test

Sr. # Questions Answers Choice
1 For one mole a gas, the total kinetic energy is equal to. 2/3 Rt 3/2 RT 2/3 kT 3/2 kT
2 Which of the following is not a correct postulate of the kinetic theory of gases. The molecules are in random motion The gaseous collisions are perfectly elastic The average kinetic energies of different gases are equal at a particular temperature. The pressure exerted on the walls of the container is due to inter molecular forces.
3 The gases H2, N2, O2 and NH3 . H2 =2 , N2 = 28, O2 = 32 and NH3 =17 will effuse in the order. H2> N2> O2 > NH3 NH3 >O2 > N2 > H2 H2 > N2 > NH3 > O2 H2 >NH3 > N2 > O2
4 For a given mass of a gas, if pressure in reduced to half and temperature in doubled, then volume. 2V<sup>2</sup> 4V 8 V V<sup>2</sup>
5 For a given mass of a gas at constant temperature, if the value V becomes a times, the pressure will become. 3P P/3 9P 3P/T
6 Which of the following statement is not correct regarding the constant R . and in ideal gas equation PV= nRT Its value in independent of temperature Its value is independent of pressure In SI Units its value is 8.314 K<sup>-1</sup> mol<sup>-1</sup> It is called the universal gas constant per molecule.
7 For a given mass of a gas if temperature increase Pressure and volume remain Constance Volume increases provided pressure is kept constant Pressure decreases provided volume is constant Both volume and pressure decrease
8 Total pressure exerted by a mistress of two or more than two gases in a definite volume as any given temperature is equal to the sum of partial pressures which each gas would exert, if it occupied the same volume alone, at the same temperature This is a statement. Boyle's law Charle's law Graham's law Dalton's law
9 The constant temperature and pressure,the rates of effusion of various gases vary inversely as square root of their denature. This is a statement of. Boyle's law <div>Charles's law</div> Graham's law Daltons's law
10 Equal volumes of all gases, under similar conditions of temperature and pressure, contain equal number of molecules. This is a statement of. Graham's law Dalton's law Avogadro' law Boyle's law
11 The volume of given mass of gas at constant pressure is directly proportional to the absolute temperature.This is a statement of. Charles's law Boyle's law Avogadro's law Dalton's law
12 The volume of a given mass of gas at constant temperature varies inversely with the pressure. This is a statement of. Charlea's law Avogadro's law Boyle's law Dalton 's law
13 The SI unit of pressure is Pascal it is define da sa force per unit are of 1N/m2 one atmosphere of pressure is equal to. 760 mm of Hg 1 bar 101 k Pa 760 torr All are correct
14 Which of the following statement is not related to the characteristics of gaseous state. The inter molecular forces of attraction are not strong in gaseous state The gases do not have definite shape and volume The gases are characterized by low density. The gases have low comprehensibility
15 A theoretical link between quantum mechanics and thermodynamic is. Electrochemistry Kinetic theory of gases Spectroscopic analysis Statistical thermodynamics
16 Which of the following is not evoked in quantum theory? Schrodinger wave equation The rigid rotor approximation The particle in a box Boltzmann distribution
17 The Schrodinger equation when solved for any system gives. The mean force path The Polarizability The energy function The wave function
18 In quantum theory, which of the following tells us that the prediction of quantum mechanics must pass smoothly into those of classical mechanics as we progress in a continuous way from microsopic to macroecopic. Uncertainty principle Correspondence principle Probability distribution Aufbau principle
19 Which of the following statement is not related to MOT Atomic orbitals lose their identities MOTgives as idea of denationalization MOT uses all the orbitals and elections It treated bond as purely covalent
20 Which of the following statement is not related to BVT individual orbitals lose their indention VBT uses the concept of resonance VBT does not explain the paramanhetic nature of molecule it uses only valence electron
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