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Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 11 (60 MCQs)

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1. What does the Nernst equation allow you to calculate?
2. The equivalent conductance of solution of a weak monobasic acid is 8.0 mhos cm$^{2}$ and at infinite dilution is 400 mhos cm$^{2}$. The dissociation constant of this acid is:(A) (B) (C) (D)
3. If during d-d transition if elctron abseorb Voilet colour which colour it will emit.
4. A non-spontaneous electrochemical process that USES electricity
5. Which metal contains position potential value?
6. What are some common applications of electrochemical cells in everyday life?
7. Can F$_{2}$/F$^{-}$ oxidize Pb/Pb$^{2+}$?
8. Conductivity of a solution decrease with dilution DUE TO
9. In the Nernst equation, what does the variable 'n' represent?
10. What is the name of the positive terminal in an electrolytic cell?
11. At infinite dilution when dissociation is complete every ion make a definite contribution toward molar conductivity irrespective to the nature of other ion with which it is associated is
12. Calculate the emf of the following cell at 25$^\circ$C:Ag(s) | Ag$^{+}$ (10$^{-3}$ M) || Cu$^{2+}$ (10$^{-1}$ M) | Cu(s) Given E$^{0}$$_{cell}$ = +0.46 V and log 10$^{n}$ = n.
13. Which of the following statements about the Nernst equation is true?
14. Which of the following is an example of an electrolytic cell?
15. In voltaic cells, such as those diagrammed in your text, the salt bridge .....
16. The electrode potential of saturated calomel electrode is
17. Which of the following will form the cathode with respect to iron anode in an electrolyte cell-( Eo =-0.40 v)
18. The elctro potential of zinc half cell is
19. Which of the following is the strongest reducing agent?
20. Which ions are present in molten sodium chloride? // Ion manakah yang terdapat dalam leburan natrium klorida?
21. For a chemical reaction A $\rightarrow$ B, it is found that the rate of the reaction quardruples when the concentration of A is doubled. The rate expression for the reaction is, rate = k [A]$^{n}$ where the value of n is
22. Nickel Cadmium cell is .....
23. What is the oxidation state of the carbon in FeCO$_{3}$?
24. The cell constant of a conductivity cell keeps changing with the electrolytes used.
25. Molar conductivity of NH4OH increases sharply at infinite dilution due to
26. Standard solution of KNO3 is used to make a salt bridge because
27. Hydrogen can be used as a fuel for cars. Which of the following is an advantage of using hydrogen instead of petrol?
28. How many phases are present in each of the following systems:a drop of water placed in a stoppered bottlea piece of molten ice placed in a beaker covered with a watch glassmixture of N2, H2 and O2.
29. Lewis base among the following
30. Which of the following is given to a fuel cell's cathode?
31. What is the standard electrode potential of hydrogen in electrochemistry?
32. E$^\circ$ values are dependent on the stoichiometric coefficients for the half-reaction, and, most importantly, the coefficients used to produce a balanced overall reaction do not affect the value of the cell potential.
33. The Nernst equation, Ecell = Eo cell-RT/nF lnQ indicates that the equilibrium constant Kc will be equal to when
34. Which of the following metals is the MOST COMMON METAL INDICATOR ELECTRODE?
35. ..... process is any conversion between chemical energy and electrical energy.
36. Discuss the role of electrochemistry in environmental remediation.
37. In a galvanic cell
38. The flow of current in an electrolyte is due to the movement of
39. What does the standard reduction potential measure?
40. Increase in conductance with increase in potential is
41. In a redox reaction, what happens to the oxidizing agent?
42. Effect of dilution on conductivity of solution
43. You have a solution of dil. NaNO3 in water.How can you predict the element discharged at the Anode?
44. Sophia is conducting an experiment in her chemistry class. She uses a device that converts chemical energy into electrical energy to drive a chemical reaction.
45. After a steady current of 18.0 A was passed for 20.0 minutes through a solution of copper(II) sulphate, the mass of the impure copper anode decreased by 8.01 g. What is the percentage purity of copper in the impure copper rod? [Ar Cu = 63.5 ; Faraday's constant = 96500 C mol$^{-1}$]
46. What happen if external emf greater than 1.1 Volt is applied on Daniel Cell.
47. What role does the Nernst equation play in determining the pH of a solution?
48. The electrode at which oxidation occurs is called the .....
49. What is the oxidation state of nitrogen in NaNO$_{2}$?
50. What charge, in coulombs, is required to deposit 1.5 g Mg(s) from a solution of Mg$^{2+}$(aq)? (F = 96480 C/mol e$^{-}$)
51. Answer the following questions using the unbalanced half-reaction:Cr$_{2}$O$_{7}$$^{2-}$ + H$^{+}$ $\rightarrow$ Cr$^{3+}$ + H$_{2}$OWhat is the oxidation number of Cr in Cr$_{2}$O$_{7}$$^{2-}$?
52. What is a standard half-cell?
53. What role does a cellulose separator play in a battery?
54. Reduction is the loss of electrons.
55. The reaction, 3ClO-(aq) $\rightarrow$ ClO3 (aq) + 2Cl-(aq) is an example of
56. Which of the following is a primary component of a galvanic cell?
57. FARADAY'S LAW CAN BE EXPRESSED AS;
58. Which of the following happens during the electrolysis of molten sodium bromide?I Sodium ions are attracted to the cathode.II Bromide ions are attracted to the anode.III Electrons are moving from anode to cathode.IV At the cathode, bromine ions accept electron from anode.
59. On increasing the temperature, the dissociation of an electrolyte increases, hence conduction
60. Voltaic cell in which the reactants can be supplied continuously and the products of the cell reaction are continuously removed
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