This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 37 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 37 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In home UPS and in all transportation vehicles, ..... battery is used. A) Primary. B) Lead acid. C) Ni-CAD. D) Lithium ion. Show Answer Correct Answer: B) Lead acid. 2. What is the oxidation number of carbon in H$_{2}$CO$_{3}$(aq)? A) 4-. B) 2+. C) 2-. D) 4+. Show Answer Correct Answer: D) 4+. 3. What is Faraday's law of electrolysis? A) The amount of substance produced during electrolysis is proportional to the electric charge passed. B) The electric charge does not affect the rate of electrolysis. C) The amount of substance produced is independent of the electric charge. D) Electrolysis occurs only at high temperatures. Show Answer Correct Answer: A) The amount of substance produced during electrolysis is proportional to the electric charge passed. 4. AlF$_{6}$ $^{3-}$ + 3 e$^{-}$ $\rightarrow$ Al + 6 F$^{-1}$Which of the following occurs in the reaction? A) AlF$_{6}$$^{3-}$ is reduced at the cathode. B) Al is oxidized at the anode. C) Aluminum is converted from the-3 oxidation state to the 0 oxidation state. D) Aluminum is converted from the-3 oxidation state to the 0 oxidation state. Show Answer Correct Answer: A) AlF$_{6}$$^{3-}$ is reduced at the cathode. 5. The salt bridge or porous plate ..... ions to pass from one half-cell to the other but prevents the solutions from mixing completely. A) Doesn't allow. B) Allows. C) All the above. D) None of the above. Show Answer Correct Answer: B) Allows. 6. The cell potential, E$^\circ$, for an oxidation-reduction reaction was found to equal 1.10 V. What can be saidabout this reaction? A) Spontaneous. B) Endothermic. C) At equilibrium. D) Nonspontaneous. Show Answer Correct Answer: A) Spontaneous. 7. Given the balanced ionic equation representing a reaction:Cu(s) + 2Ag$^{+}$(aq) $\rightarrow$ Cu$^{2+}$(aq) + 2Ag(s)During this reaction, electrons are transferred from A) Cu(s) to Ag$^{+}$(aq). B) Cu$^{2+}$(aq) to Ag(s). C) Ag(s) to Cu$^{2+}$(aq). D) Ag$^{+}$(aq) to Cu(s). Show Answer Correct Answer: A) Cu(s) to Ag$^{+}$(aq). 8. What is the oxidation state for a lead atom? A) 2+. B) 4+. C) 0. D) 2-. Show Answer Correct Answer: C) 0. 9. The molar conductivities are given as $\lambda$$^{0}$$_{m}$(H$_{2}$SO$_{4}$) = x S cm$^{2}$ mol$^{-1}$ $\lambda$$^{0}$$_{m}$(K$_{2}$SO$_{4}$) = y S cm$^{2}$ mol$^{-1}$$\lambda$$^{0}$$_{m}$(CH$_{3}$COOK) = z S cm$^{2}$ mol$^{-1}$$^{Molar conductance of }$$\lambda$$^{0}$$_{m}$(CH$_{3}$COOH) =? S cm$^{2}$ mol$^{-1}$ A) X-y + 2 z. B) X + y-z. C) X-y + z. D) (x-y)/2 + z. Show Answer Correct Answer: D) (x-y)/2 + z. 10. The cell which is used for electrolytic is A) Daniel cell. B) Galvanic cell. C) Electrotic cell. D) Voltaic cell. Show Answer Correct Answer: C) Electrotic cell. 11. The electrolyte composition in a cell affects its: A) Color. B) Temperature. C) Conductivity. D) Shape. Show Answer Correct Answer: C) Conductivity. 12. Which statement is correct about the Daniell cell? A) The Daniell cell is an example of an electrolytic cell. B) The spontaneous cell reaction involves the oxidation of Cu by Zn2+. C) The spontaneous cell reaction involves the reduction of Zn2+ to Zn. D) The spontaneous cell reaction involves the reduction of Cu2+ to Cu. Show Answer Correct Answer: D) The spontaneous cell reaction involves the reduction of Cu2+ to Cu. 13. Discuss the factors that affect the rate of redox reactions. A) Temperature, concentration of reactants, surface area of the reactants, and the presence of catalysts. B) Color of the reactants. C) Phase of the reactants. D) Time of day. Show Answer Correct Answer: A) Temperature, concentration of reactants, surface area of the reactants, and the presence of catalysts. 14. How do you calculate the cell potential of an electrochemical cell? A) ....cell = E$^\circ$ cell + (RT/nF) * ln(Q). B) ....cell = E$^\circ$ cell-(RT/nF) * ln(Q). C) ....cell = E$^\circ$ cell + (nF/RT) * ln(Q). D) ....cell = E$^\circ$ cell-(nF/RT) * ln(Q). Show Answer Correct Answer: B) ....cell = E$^\circ$ cell-(RT/nF) * ln(Q). 15. How many moles of mercury will be produced by electrolysing 1.0 M Hg(NO$_{3}$)$_{2}$ solution with a current of 2.00 A for 3 hours? [Hg(NO$_{3}$)$_{2}$ = 200.6 g mol$^{-1}$] A) .321. B) .1119. C) .2020. D) .0012. Show Answer Correct Answer: B) .1119. 16. Which of the following is a correct representation of a reduction half-reaction? A) $Cu^{2+} + 2e^-\rightarrow Cu$. B) $Cl_2 + 2e^-\rightarrow 2Cl^-$. C) $Na \rightarrow Na^+ + e^-$. D) $O_2 + 4e^-\rightarrow 2O^{2-}$. Show Answer Correct Answer: A) $Cu^{2+} + 2e^-\rightarrow Cu$. 17. Electrochemistry meals with A) Galvanic cells. B) Electrolytic cells. C) Both. D) None of these. Show Answer Correct Answer: C) Both. 18. An anode is ..... A) An electrode where reduction occurs. B) An element with a higher charge. C) Where reduction and oxidation. D) An electrode where oxidation occurs. Show Answer Correct Answer: D) An electrode where oxidation occurs. 19. ..... cell converts electrical energy in to chemical energy. A) Voltaic. B) Galvanic. C) Electrolytic. D) Electrochemical. Show Answer Correct Answer: C) Electrolytic. 20. In electrochemistry, what does the term 'oxidation' refer to? A) Loss of electrons. B) Change in state. C) Gain of electrons. D) Formation of compounds. Show Answer Correct Answer: A) Loss of electrons. 21. Which electrode is inert electrode. A) Copper. B) Iron. C) Carbon. D) Zinc. Show Answer Correct Answer: C) Carbon. 22. What occurs to the mass of copper electrode in the following reaction? A) Increases. B) Decreases. C) Remains the same. D) None of the above. Show Answer Correct Answer: A) Increases. 23. E$^{o}$cell ( Standard Cell Potential)-The potential measured at a specific temperature (298 K) with no current flowing and all concentrations in their "Standard States" . Which in False about "Standard States" ? A) 1 M for solutions. B) 1 atm for gases. C) Pure solids for electrodes. D) None. Show Answer Correct Answer: D) None. 24. What is the effect of increasing the concentration of the electrolyte in an electrolytic cell? A) It decreases the cell potential. B) It increases the cell potential. C) It has no effect on the cell potential. D) It reverses the direction of the current. Show Answer Correct Answer: B) It increases the cell potential. 25. In the reaction:Fe + Cu$^{2+ }$ $\rightarrow$Fe$^{2+}$ + CuWhat is the reductant? A) Fe. B) Cu$^{2+}$. C) Fe$^{2+}$. D) Cu. Show Answer Correct Answer: A) Fe. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 1Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 2Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 3Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 4Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 5Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 6Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 7Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 8Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 9Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books