This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In strong electrolytes, ..... % dissociation of ions takesplace. A) 50. B) 70. C) 80. D) 100. Show Answer Correct Answer: D) 100. 2. What is an electrochemical cell and its components? A) An electrochemical cell consists of two electrodes (anode and cathode), an electrolyte, and a separator. B) An electrochemical cell is made up of a resistor and a capacitor. C) An electrochemical cell has only one type of electrolyte. D) A battery consists of a single electrode and a conductor. Show Answer Correct Answer: A) An electrochemical cell consists of two electrodes (anode and cathode), an electrolyte, and a separator. 3. For a certain reaction aA $\rightarrow$ bB, the rate of reaction is doubled when the concentration of A is increased by four times. The rate ot reaction is equal to A) K[A]$^{a}$. B) K[A]$^{1/2}$. C) K[A]$^{1/a}$. D) K[A]. Show Answer Correct Answer: B) K[A]$^{1/2}$. 4. If an electrochemical reaction is spontaneous, what will E$_{cell}$ be? A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive. 5. Which has more reduction potential A) Copper. B) Zinc. C) Hydrogen. D) Silver. Show Answer Correct Answer: D) Silver. 6. Determine the standard electrode potential for the reaction Zn(s) + Cu2+(aq) $\rightarrow$ Zn2+(aq) + Cu(s). A) +0.34 V. B) -0.76 V. C) +1.44 V. D) -1.98 V. Show Answer Correct Answer: C) +1.44 V. 7. For the given cell, Mg | Mg $^{2+}$|| Cu $^{2+}$|Cu A) Mg is cathode. B) Cu is anode. C) The cell reaction is Mg (s)+ Cu$^{2+ }$(aq)$\rightarrow$ Mg $^{2+ }$+ Cu. D) Cu is the reducing agent. Show Answer Correct Answer: C) The cell reaction is Mg (s)+ Cu$^{2+ }$(aq)$\rightarrow$ Mg $^{2+ }$+ Cu. 8. Which energy conversion shown below takes place in a galvanic cell? A) Electrical to chemical. B) Mechanical to chemical. C) Mechanical to electrical. D) Chemical to electrical. Show Answer Correct Answer: D) Chemical to electrical. 9. Ohm's law gives a relation between A) Current and temperature. B) Potential difference and current. C) Resistance and pressure. D) Pressure and potential difference. Show Answer Correct Answer: B) Potential difference and current. 10. If limiting molar conductivity of Ca$^{2+}$ and Cl$^{-}$ are 119.0 and 76.3 S cm$^{2}$ mol$^{-1}$, then the value of limiting molar conductivity of CaCl2 will be A) 195.3 S cm$^{2}$ mol$^{-1}$. B) 271.6 S cm$^{2}$ mol$^{-1}$. C) 43.3 S cm$^{2}$ mol$^{-1}$. D) 314.3 S cm$^{2}$ mol$^{-1}$. Show Answer Correct Answer: B) 271.6 S cm$^{2}$ mol$^{-1}$. 11. Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because A) Zinc is lighter than iron. B) Zinc has lower melting point than iron. C) Zinc has lower negative electrode potential than iron. D) Zinc has higher negative electrode potential than iron. Show Answer Correct Answer: D) Zinc has higher negative electrode potential than iron. 12. What is the role of the cathode in a galvanic cell? A) It is where oxidation occurs. B) It is where reduction occurs. C) It generates electrical energy. D) It connects the two half-cells. Show Answer Correct Answer: B) It is where reduction occurs. 13. Weak electrolytes theory was explained by? A) Debye Huckel. B) Kohlrausch's. C) Arrehenius. D) Wurtz. Show Answer Correct Answer: C) Arrehenius. 14. In electrochemical cell, oxidation takes place at A) Right. B) Left. C) Top. D) Bottom. Show Answer Correct Answer: B) Left. 15. Abnormal ion conductance is noted in A) $^{Oxalate ions ions}$. B) OH-ions. C) Acetate ions. D) Picrate ions. Show Answer Correct Answer: B) OH-ions. 16. What is a galvanic (voltaic) cell? A) It is a cell that destroys electrons on one side and creates electrons on the other side. B) It is a cell that contains only one metal bar and one aqueous ion solution. C) It is a type of battery that drives a redox reaction when electricity is applied. D) It is a type of battery that generates an electrical current from redox reactions. Show Answer Correct Answer: D) It is a type of battery that generates an electrical current from redox reactions. 17. A chemical species in an electrochemical reaction that LOSSES electrons undergoes ..... A) Oxidation Reaction. B) Reduction Reaction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Oxidation Reaction. 18. Which of the following conditions would make the Nernst equation reduce to the standard cell potential equation? A) When the reaction quotient Q is 1. B) When the temperature is 0 Kelvin. C) When the concentration of all reactants and products is 1 M. D) When the pressure is 1 atm. Show Answer Correct Answer: C) When the concentration of all reactants and products is 1 M. 19. At anode which of the following reaction takes place A) Oxidation. B) Reduction. C) Redox reaction. D) Non of these. Show Answer Correct Answer: A) Oxidation. 20. Galvanic cells convert A) Mechanical energy in to electrical energy. B) Potential energy in to electrical energy. C) Electrical energy in to chemical energy. D) Chemical energy in to electrical energy. Show Answer Correct Answer: D) Chemical energy in to electrical energy. 21. Which of the following metals will react spontaneously with a solution containing iron ions? A) Sn. B) Al. C) Cu. D) Pb. Show Answer Correct Answer: B) Al. 22. Explain why the electrolyte has to be a aqueous or molten state A) So the ions can move. B) So the electrons can move. C) All the above. D) None of the above. Show Answer Correct Answer: A) So the ions can move. 23. Proses yang berlaku di anod ialah ..... A) Elektrolisis. B) Redoks. C) Pengoksidaan. D) Penurunan. Show Answer Correct Answer: C) Pengoksidaan. 24. The standard reduction potential of metals A, B, C and D are-0.40v, +0.34v, +0.8v and-1.67v. The metal that can displace all others is A) D. B) B. C) A. D) C. Show Answer Correct Answer: A) D. 25. Emf of the cell constructed by combining electrodes of Cd & Ag was measured to be 1.2 V at 298K. What is the electrode potential of Cd electrode if Standard electrode potential of Ag electrode is 0.8 V and it is in contact with 1M solution of AgNO$_{3.}$ A) -2V. B) -0.4V. C) 2V. D) 0.4V. Show Answer Correct Answer: B) -0.4V. ← 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