12th HSC Chemical Kinetics previous year questions CBSE, ICSE , All State Boards

12th HSC Chemical Kinetics previous year questions

Are you a Class 12th HSC student aiming to ace your Chemistry exam? One of the most scoring yet concept-heavy chapters is Chemical Kinetics. At Agastya Classes, we help you decode this chapter by analyzing previous year questions and providing expert tips to master the topic. In this blog, we’ll work on the most frequently asked Chemical Kinetics questions in Maharashtra Board HSC exams and show you how to prepare effectively.

Previous year questions for Chemical Kinetics

Why Focus on Chemical Kinetics?

Chemical Kinetics carries significant weightage in the HSC Chemistry exam. Understanding the rate of reaction, factors affecting it, and integrated rate laws is essential not just for board exams but also for competitive exams like NEET and JEE.

Previous Year Questions – Topic-Wise Analysis

Here are some important previous year questions from the Chemical Kinetics chapter based on past 5–10 years of HSC board papers:

12th Chemistry Chemical Kinetics important questions

1. Rate of Reaction

Define rate of reaction. Write its unit. (2022, 2019)

Differentiate between average rate and instantaneous rate. (2021)

2. Factors Affecting Rate

Explain how temperature affects the rate of reaction using the Arrhenius equation. (2018, 2020)

Write any two factors affecting the rate of reaction. (2023)

3. Order and Molecularity

Distinguish between order of reaction and molecularity. (2019)

Write characteristics of zero-order reaction. (2020)

4. Integrated Rate Law

Derive the integrated rate law for a first-order reaction. (2021, 2023)

Show that half-life of a first-order reaction is independent of initial concentration. (2022)

5. Graphical Representation

Draw and explain the graph between concentration and time for a zero-order reaction. (2017)

Give the graphical method to determine the order of reaction. (2019)

Chemical Kinetics previous year questions HSC Maharashtra Board

Expert Tips by Agastya Classes

✅ Focus on Conceptual Clarity

Chemical Kinetics is not about mugging formulas. Understand the logic behind reaction rates, collision theory, and graphical analysis.

✅ Solve Previous Year Papers

Make it a habit to solve at least 5 years’ worth of questions. This gives you an insight into patterns and commonly repeated concepts.

✅ Practice Numerical Problems

Numericals based on first-order and zero-order reactions are a must. Ensure you're confident with units and conversions.

✅ Use Flashcards for Definitions

Keep quick notes or flashcards for key definitions like rate constant, half-life, activation energy, etc.