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 The expression of specific conductance is given by Ls= I/R , l/A Ls = L I/A Ls = I/L , A/l LS = r l/A<br>
2 Which of the following statements is not true with reference to ionic conductors. Ionic conductance is due to movement of the ions It involves the transfer of matter It involves oxidation reduction reactions It decreases with rise in temperature.
3 The blue colour of CuSO4 disappears on adding Zn granules to it . it is because of . Oxidation of Cu atom Oxidation of Zn<sup>2+</sup> Oxidation Cu<sup>2+</sup> Oxidation of Zn<sup>2+</sup>
4 When some quantity of electricity is passed though two electrolytic cells. The ratio of the mass of the products obtained at the cathode is the same as the ratio of their Densities Atomic masses Equivalent masses Atomic numbers
5 Which of the following relation corresponds to Faraday law of electrolysis. m = ZI t E = mc<sup>2</sup> E = ho None of the above
6 The device that convert the chemical energy of fuel directly into electrical energy is called. Galvanic cell Electrolytic cell Fuel cell Concentration cell
7 The branch of chemistry which is concerned with the interrelation of electrical and chemical energy is called. Reaction dynamics Electrochemisty Surface chemistry Kinetics
8 Which of the following solids is a better conductor of electricity. Pore NaCl cyrstal Diamond Graphite Marble pieces
9 The point group of XeOF4 is. C6v C4h D4h D2h
10 How many planes of symmetry are present in benzene. 1 plane 3 planes 5 planes 7 planes
11 Ethylene belongs to. C<sub>2v</sub> group D<sub>2h</sub> group C<sub>2</sub> group D<sub>ah</sub> group
12 CO belong to which group. C<sub>2v</sub> D<sub>2h</sub> C<sub>av</sub> D<sub>ah</sub>
13 Which of the following molecules belongs to Cav point group. H2O H2S NH3 BF3
14 Which of the following statement is not correct with respect to group theory. Two elements of a group combine to form a third element of a group An element combines with itself to form another element of the group. Each element of the group obey associative law of combination Each group element has no reciprocal
15 Which of the following molecules have centre of symmetry. H2O HCl CO2 H2SO4
16 Linear molecules have ____________ axis of rotation C1 C2 C C3
17 In C4-axis of rotation, an object in rotated through an angle of. 120<sup> o</sup> 180<sup> o</sup> 100 <sup>o</sup> 90<sup> o</sup>
18 In proper rotation (Cn) an object is rotated through an angle of. a/n radians 2n/n radians 3n/n radians 4n/n radians
19 Which of the following symmetry element leaves the molecule or an object unchanged. Proper rotation Improper rotation Inversion axis Identity
20 Which of the following item is not symmetry element. Pllane of symmetry Inversion centre Improper rotation Optical activity
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