2. The cell which involves the conversion of chemical energy into electrical energy is called:
(A) Electrolytic cell
(B) Galvanic cell
(C) Conductivity cell
(D) All of these
Multiple Choice
ID- 12323
BSEB, 2019 (C)
3. When flow of electric current in a conductor is through flow of electron then, the conductor is called:
(A) Metallic conductor
(B) Electrolytic conductor
(C) Bad conductor
(D) None of these
Multiple Choice
ID- 12324
BSEB, 2013, 2015, 2016 (A)
4. If 96500 coulomb electricity is passed through CuSO4 solution, it will liberate.
(A) 63.5 gm of Cu
(B) 31.76 gm of Cu
(C) 96500 gm of Cu
(D) 100 gm of Cu
Multiple Choice
ID- 12325
BSEB, 2013
5. Fused NaCI on electrolysis gives .......... on cathode.
(A) Chlorine
(B) Sodium
(C) Sodium amalgam
(D) Hydrogen
Multiple Choice
ID- 12326
BSEB, 2018 (C)
6. In an aqueous solutions hydrogen (H2) will not reduce:
(A) Fe3+
(B) Cu2+
(C) Au2+
(D) Ag+
Multiple Choice
ID- 12327
7. Which of the following is a second cell?
(A) Leclanche cell
(B) Lead storage battery
(C) Concentration cell
(D) All of these
Multiple Choice
ID- 12328
8. Equilibrium constant K is related to E°cell and not Ecell because:
(A) E°cell is easier to measure than Ecell
(B) Ecell because zero at equilibrium point but E°cell remains constant under all conditions
(C) at a given temperature, Ecell changes hence value of K can't be measured
(D) any of the terms Ecell or E°cell can be used
Multiple Choice
ID- 12329
9. Cell reaction is spontaneous, when:
(A) E°red is negative
(B) ∆G° is negative
(C) E°oxid is position
(D) ∆G° is positive
Multiple Choice
ID- 12330
10. Molar conductivity of 0.15 M solution of KCI at 298 K, if it's conductivity of 0.0152 S cm–1 will be:
(A) 124 Ω–1 cm2 mol–1
(B) 204 Ω–1 cm2 mol–1
(C) 101 Ω–1 cm2 mol–1
(D) 300 Ω–1 cm2 mol–1
Multiple Choice
ID- 12331
11. Electrical conductance though metals is called metallic or electric conductance and is due the movement of electrons. The electronic conductance depends on:
(A) the nature and structure of the metal
(B) the number of valence electrons per atom
(C) change in temperature
(D) all of these
Multiple Choice
ID- 12332
12. The specific conductivity of N/10 KCI solution at 20°C is 0.0212 ohm–1 cm–1 and the resistance of the cell containing this solution at 20°C is 55 ohm. The cell constant is:
(A) 3.324 cm–1
(B) 1.166 cm–1
(C) 2.372 cm–1
(D) 3.682 cm–1
Multiple Choice
ID- 12333
BSEB, 2016, 2017 (C)
13. Faraday's second law of electrolysis is related to:
(A) Atomic number of cation
(B) Speed of cation
(C) Speed of anion
(D) Equivalent weight of electrolyte
Multiple Choice
ID- 12334
14. The molar conductivity is maximum for the solution of concentration:
(A) 0.004 M
(B) 0.002 M
(C) 0.005 M
(D) 0.001 M
Multiple Choice
ID- 12335
15. How long would it take to deposit 50 g of Al from an electrolytic cell containing Al2O using a current of 105 ampere?
(A) 1.54 h
(B) 1.42 h
(C) 1.32 h
(D) 2.15 h
Multiple Choice
ID- 12336
16. The charger required for reducing 1 mole of MnO–4 to Mn2+ is:
(A) 1.93 x 105 C
(B) 2.895 x 105 C
(C) 4.28 x 105 C
(D) 4.825 x 105 C
Multiple Choice
ID- 12365
17. How much electricity in terms of Faraday is required to produce 100 g of Ca from molten CaCI2?
(A) 1 F
(B) 2 F
(C) 3 F
(D) 5 F
Multiple Choice
ID- 12366
18. If a current 1.5 ampere flows through metallic for 3 hours, then how many electrons would flow through the wire?
(A) 2.25 x 1022 electrons
(B) 1.13 x 1023 electrons
(C) 1.01 x 1023 electrons
(D) 4.5 x 1023 electrons
Multiple Choice
ID- 12367
BSEB, 2021 (A)
19. How many charge is required for reduction of 1 mole of Al3+ to Al?
(A) 3.0 x 105C
(B) 28.95 x 105C
(C) 289.5 x 105C
(D) 2895 x 105C
Multiple Choice
ID- 12368
BSEB, 2021 (A)
20. The standard reduction potential values of elements A, B and C are + 0.68 V, –2.50 V and –0.50 V respectively. The order of their reducing power is:
(A) A > B > C
(B) A > C > B
(C) C > B > A
(D) B > C > A
Multiple Choice
ID- 12369
21. How much metal will be deposited when a current on 12 ampere with 75% efficiency is passed through the cell for 3 h? (Given : Z = 4 x 10–4)
(A) 32.4 g
(B) 38.8 g
(C) 36.0 g
(D) 22.4 g
Multiple Choice
ID- 12370
BSEB, 2018 (C)
22. Which has the maximum standard oxidation potential?
(A) Zn
(B) Cu
(C) Ag
(D) Mg
Multiple Choice
ID- 12371
23. Which of the following statements is not correct about an inert electrode in a cell?
(A) It does not participate in the cell reaction.
(B) It provides surface either for oxidation or for reduction reaction.
(C) It provides surface for conduction of electrons.
(D) It provides surface for redox reaction.
Multiple Choice
ID- 12372
24. An electrochemical cell can behave like an electrolytic cell when .......... .
(A) Ecell = 0
(B) Ecell > Eext
(C) Eext > Ecell
(D) Ecell = Eext
Multiple Choice
ID- 12373
25. Which of the statements about solutions of electrolytes is not correct?
(A) Conductivity of solution depends upon size of ions.
(B) Conductivity depends upon viscosity of solution.
(C) Conductivity does not depend upon salvation of ions present in solution.
(D) Conductivity of solution increases with temperature.
Multiple Choice
ID- 12374
BSEB, 2021 (A)
26. The electromotive force (EMF) of the cell for the cell reaction at equilibrium state is:
(A) positive
(B) zero
(C) negative
(D) none of these
Multiple Choice
ID- 12375
27. The quantity of charge required to obtain one mole of aluminium from Al2O3 is .......... .
(A) 1 F
(B) 6 F
(C) 3 F
(D) 2 F
Multiple Choice
ID- 12376
BSEB, 2019 (A)
28. One Faraday electricity equal to how much Coulombs?
(A) 96550
(B) 96500
(C) 96000
(D) 95500
Multiple Choice
ID- 12377
29. Why charging the lead storage battery .......... .
(A) PbSO4 anode is reduced to Pb
(B) PbSO4 cathode is reduced to Pb
(C) PbSO4 cathode os oxidised to Pb
(D) PbSO4 anode is oxidised to PbO2
Multiple Choice
ID- 12378
BSEB, 2021 (A)
30. Zn (s) | Zn2+ (aq) || Cu2+ (aq) | Cu (s) is:
(A) Weston cell
(B) Daniel cell
(C) Calomel cell
(D) None of these
Multiple Choice
ID- 12379
BSEB, 2017 (A)
31. When one faraday of electric current is passed, the mass deposited, is equal to:
(A) One gram equivalent
(B) One gram mole
(C) electrochemical equivalent
(D) Half gram equivalent
Multiple Choice
ID- 12380
BSEB, 2016 (C)
32. The electrode thought which electrons enter into electrolytic solution is:
(A) Cathode
(B) Anode
(C) May be anode cathode
(D) None
Multiple Choice
ID- 12381
BSEB, 2018 (A)
33. A dilute aqueous solution of sodium fluoride is electrolysed, the products at the anode and cathode are:
(A) F2, Na
(B) F2, H2
(C) O2, Na
(D) O2, H2
Multiple Choice
ID- 12382
BSEB, 2018 (A)
34. Equivalent conductance of saturated BaSO4 is 400 ohm–1 cm2 eqvt–1 and specific conductance is 8 x 10–5 ohm–1 cm–1. The Ksp of BaSO4 is: