Electrochemistry Important Questions for CBSE Boards 2026 Class 12 is a crucial topic that carries significant weight in the Central Board of Secondary Education examination, scheduled for February 28, 2026 (10:30 AM – 1:30 PM). This chapter focuses on the interconversion of chemical and electrical energy, covering key concepts such as the Nernst equation, standard electrode potentials, galvanic and electrolytic cells, conductivity, molar conductivity, and Kohlrausch’s Law. Since numerical problems and assertion–reason questions are frequently asked from this unit, a clear understanding of formulas, cell representation, and reaction feasibility is essential for scoring high marks in the 2026 board exams.
Below are the most important Electrochemistry questions specially selected to help students prepare effectively for the CBSE Class 12 board exam scheduled on 28 February 2026. These questions cover key topics such as Galvanic Cells, Nernst Equation, EMF Calculations, Conductivity, Molar Conductivity, Kohlrausch’s Law, and Electrochemical Series.
Practicing these important questions will help students strengthen their conceptual clarity, improve numerical solving skills, and understand important formulas and reactions. Regular practice will also boost confidence and help in scoring high marks in the final examination.
1. Electrochemistry (Very Important)
Write the Nernst Equation and explain each term.
Calculate EMF of a cell using given data.
Define standard electrode potential.
What is the function of a salt bridge?
Differentiate between galvanic cell and electrolytic cell.
2. Electrochemical Series
Which metal is the strongest reducing agent?
Predict whether a given reaction is feasible using E° values.
Arrange given metals in order of increasing reducing power.
3. Conductivity & Kohlrausch’s Law
State and explain Kohlrausch’s Law.
Why does molar conductivity increase on dilution?
Define limiting molar conductivity.
Compare conductivity and molar conductivity.
4. Chemical Kinetics
Define rate of reaction and rate constant.
Derive the expression for first-order reaction.
What is half-life of a first-order reaction?
Write units of rate constant for different orders.
5. Solutions
Define Raoult’s Law.
What are colligative properties?
Calculate molar mass using elevation in boiling point.
What is abnormal molar mass?