Ch-10 Electrochemistry Leave a Comment / By abdulslambsn@gmail.com / October 6, 2025 Welcome To Your Quiz "Ch-10 Electrochemistry" Click on "Start Quiz" To Continue... 1. The electrolyte KOH is used in cell: Lead accumulator Ni - Cd cell Alkaline battery Silver oxide battery None 2. In the reaction 2Fe + 3Cl2 ------> 2FeCIз: Fe is reduced Fe is oxidized Cl2 is oxidized None of these happens None 3. Oxidation state of hydrogen in CaH2 is: +1 -1 +2 0 None 4. Cu metal can be purified in electrolytic cell by making the impure Cu as: Anode Cathode Anode and Cathode Depends upon nature of solution None 5. Fuel cells convert chemical energy into: Heat energy Light energy Electrical energy Mechanical energy None 6. Nelson's cell and Down's cell are example of: Electrochemical cell Galvanic cell Electrolytic cell None of these None 7. The oxidation number of Cr in K2Cr2O7 is: +14 +12 +6 +13 None 8. The electrolyte used in fuel cell is: Aqueous NaCl Molten NaCI KOH NaNO3 None 9. Electrode potential of S.H.E arbitrarily taken in volts is: 0.00 1.00 0.01 0.50 None 10. Which one is not an electrolyte: Aqueous NaCl Aqueous CuSO4 Cu metal H2SO4 None 11. E.M.f of Zn-Cu cell is: 0.0V 0.5 V 1.0V 1.10V None 12. The highest reduction potential in the electrochemical series is of F2 and its value is: +3.87V -3.87V +2.87 V -2.87V None 13. Percentage of H2SO4 used in lead accumulator is: 40% 25% 30% 50% None 14. Cathode in NICAD cell is: Ag2O NiO2 Cd Zn None 15. The extraction of Na-metal by electrolysis of fused NaCl is carried out in: Down's cell Fuel cell Nelson's cell Voltaic cell None 16. Sulphur has the highest state in: SO2 SO3 H2S H2SO3 None 17. In rusting of iron shown by the reaction 4Fe + 302→2Fe2O3, Iron is: Precipitated Reduced Hydrolyzed Oxidized None 18. When aqueous NaCl is electrolyzed, which of the following get discharged at cathode: H+ Na+ OH Cl- None 19. A decrease in oxidation number is called: Oxidation Reduction Neutralization e.m.f None 20. Oxidation state of carbon in glucose (C6H1206) is: 0 1 2 4 None 21. Galvanic cells which cannot be re-charged are called: Diffused cells Secondary cells Tertiary cells Primary cells None 22. Consider the following reaction: Zn + Cu2+ → Zn2+ + Cu With reference to the above, which one of the following is the correct statement? Zn is reduced to Zn 2+ ions Zn is oxidised to Zn 2+ ions. Zn 2+ ions are oxidised to Zn. Cu 2+ ions are oxidized to Cu. None 23. Reduction never involves: gain of electrons decrease in oxidation number loss of electrons decrease in valency of electropositive component None 24. Which of the following has same oxidation state in all its compounds: Be Br Cl N None 25. The overall positive reaction potential value predicts that process is: Not feasible Feasible Impossible No identification None 26. In which of the following compounds oxidation number of sulphur is negative: SO2 H2SO4 H2S Na2SO4 None 27. Which of the following is a primary cell: Fuel cell Lead Accumulator Alkaline dry ceall Daniel cell None 28. Which of the following is a reducing agent in following reaction: P + HNO3 -----> H3PO4 + NO + H2O Phosphorus Nitrogen Nitric acid water None 29. When brine solution is electrolysed which of the following ions get discharged at anode: OH- Cl- Na+ H+ None 30. The change in the oxidation state of nitrogen in the following reaction is: Cu + HNO3 -----> Cu(NO3)2 + NO2 + H2O +5 to -2 +5 to +4 +5 to 0 0 to -4 None 1 out of 6 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
