Electrochemistry
174 CBSE Class 12 Chemistry previous year questions (PYQs) from 5 papers, 2022 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 46 easy · 92 moderate · 36 hard.
- Most-asked subtopics: Conductance of Electrolytic Solutions (60), Nernst Equation (48), Electrolytic Cells and Electrolysis (25).
- Updated 13 September 2026.
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#1EasyBatteries
#2ModerateNernst Equation
#3EasyFuel Cells
#4ModerateNernst Equation
#5ModerateConductance of Electrolytic Solutions
#6ModerateElectrolytic Cells and Electrolysis
#7EasyConductance of Electrolytic Solutions
#8ModerateElectrochemical Cells
#9ModerateElectrolytic Cells and Electrolysis
#10EasyFuel Cells
#11HardNernst Equation
#12ModerateNernst Equation
#13ModerateElectrolytic Cells and Electrolysis
#14ModerateNernst Equation
#15ModerateFuel Cells
#16ModerateConductance of Electrolytic Solutions
#17HardNernst Equation
#18HardNernst Equation
#19EasyConductance of Electrolytic Solutions
#20EasyConductance of Electrolytic Solutions
#21EasyBatteries
#22EasyConductance of Electrolytic Solutions
#23EasyConductance of Electrolytic Solutions
#24EasyBatteries
#25EasyElectrolytic Cells and Electrolysis
#26ModerateConductance of Electrolytic Solutions
#27ModerateConductance of Electrolytic Solutions
#28EasyBatteries
#29EasyBatteries
#30EasyConductance of Electrolytic Solutions
#31EasyElectrolytic Cells and Electrolysis
#32ModerateNernst Equation
#33ModerateNernst Equation
#34ModerateConductance of Electrolytic Solutions
#35EasyConductance of Electrolytic Solutions
#36EasyConductance of Electrolytic Solutions
#37EasyConductance of Electrolytic Solutions
#38ModerateHas imageConductance of Electrolytic Solutions
#39ModerateConductance of Electrolytic Solutions
#40EasyCorrosion
#41ModerateConductance of Electrolytic Solutions
For Questions number 15 to 18, two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.#42ModerateElectrolytic Cells and Electrolysis
#43ModerateConductance of Electrolytic Solutions
For Questions number 15 to 18, two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.#44ModerateGalvanic Cells
#45EasyConductance of Electrolytic Solutions
#46ModerateConductance of Electrolytic Solutions
Rahul set-up an experiment to find resistance of aqueous KCl solution for different concentrations at 298 K using a conductivity cell connected to a Wheatstone bridge. He fed the Wheatstone bridge with a.c. power in the audio frequency range 550 to 5000 cycles per second. Once the resistance was calculated from null point he also calculated the conductivity K and molar conductivity and recorded his readings in tabular form.S.No. Conc.(M) k S S 1. 1.00 111.3 2. 0.10 129.0 3. 0.01 141.0 #47ModerateConductance of Electrolytic Solutions
Rahul set-up an experiment to find resistance of aqueous KCl solution for different concentrations at 298 K using a conductivity cell connected to a Wheatstone bridge. He fed the Wheatstone bridge with a.c. power in the audio frequency range 550 to 5000 cycles per second. Once the resistance was calculated from null point he also calculated the conductivity K and molar conductivity and recorded his readings in tabular form.S.No. Conc.(M) k S S 1. 1.00 111.3 2. 0.10 129.0 3. 0.01 141.0 #48ModerateGalvanic Cells
#49ModerateBatteries
#50ModerateConductance of Electrolytic Solutions
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