CBSE Class 9 Chemistry Mid-Term 2026: Top 18 Questions From the PW Marathon

Chemistry revision before a mid-term exam is not only about remembering definitions. You may know what a mixture or valence electron means but still need to explain why a change is chemical, interpret an atomic experiment, or show how an ion is formed. These are the places where active question practice becomes useful.

The PW Chemistry Mid-Term Marathon takes this approach by moving through concepts and questions during the revision session. The discussion ranges from mixtures and changes in matter to atomic structure and electronic configuration. The 18 questions selected below give you a way to revisit these areas and check how many you can answer without depending on your notes.

Which Class 9 Chemistry Concepts Are Covered in the PW Mid-Term Marathon 2026? 

The PW Chemistry Mid-Term Marathon revises key areas that you need to keep clear before the exam. The session moves across mixtures, physical and chemical changes, solutions, atomic structure, electronic configuration, and bonding, with questions used to check how well you can apply these concepts.

The marathon revisits these important Chemistry concepts and uses questions to help you check your understanding. As you revise, use the points below to identify the topics you need to focus on:

The marathon also discusses mixtures through processes such as coagulation and then asks questions based on mixture concepts, showing why you need to understand the process instead of relying only on its definition.

Top 18 Chemistry Questions for CBSE Class 9 From the PW Mid-Term Marathon 2026

The PW Marathon includes more Chemistry questions for practice, while the 18 selected below are grouped across Matter, Mixtures and Solutions, Physical and Chemical Changes, Water and Solution-Based Concepts, Atomic Structure, and Electronic Configuration, Valency and Bond Formation. 

You can check the complete marathon for additional questions and explanations as you continue your mid-term preparation.

Matter, Mixtures and Solutions

Physical and Chemical Changes

Water and Solution-Based Concepts

Atomic Structure

Electronic Configuration, Valency and Bond Formation

 These questions give you focused practice, but the complete PW Chemistry Mid-Term Marathon covers the concepts in greater context. Use the full session to revisit explanations, connect related topics, and strengthen your preparation before the mid-term.

Which Chemistry Concepts Need More Attention Before the Mid-Term?

Some Chemistry questions can be answered with a single fact, while others test whether you can connect two or more ideas. These are the concepts worth giving another round of attention after attempting the questions above:

• Physical and chemical changes: Be ready to classify a change and support your choice with a reason.

• Mixtures: Keep the difference between homogeneous and heterogeneous mixtures clear and identify solute and solvent correctly.

• Atomic experiments: Connect what was observed in Rutherford’s experiment with what it revealed about the atom.

• Electronic configuration: Practise arranging electrons in shells rather than memorising configurations one by one.

• Valence electrons: Check the outermost shell before deciding whether an atom is likely to lose or gain electrons.

• Ion formation: Keep track of both the electron transfer and the charge formed.

• Bond formation: Understand why oppositely charged ions attract instead of treating the final compound as something to memorise.

A useful test is to ask yourself whether you can explain a concept in two or three sentences without looking at the textbook. If you can name the answer but cannot explain the reason behind it, that concept still needs work.

How Can the PW CBSE Class 9 Chemistry Mid-Term Marathon Strengthen Your Revision?

The PW Chemistry Mid-Term Marathon combines concept revision with question practice, allowing you to check what you remember while revisiting important Chemistry areas. Instead of watching the entire session passively, you can use the explanations and questions to work specifically on concepts that still need attention.

• Test Yourself Before Watching the Solution

Pause when a question appears and attempt it independently. Comparing your response with the explanation helps you see whether you can recall and apply the concept without support.

• Revisit the Concept Behind a Wrong Answer

You do not need to revise an entire chapter every time you make a mistake. Return to the relevant explanation, clear the concept, and then attempt the question again.

• Pay Attention to Questions That Need Reasoning

Topics such as chemical changes, atomic experiments, electronic configuration, ion formation, and bonding often require an explanation along with the correct answer. Use the marathon to understand the reasoning behind these concepts rather than memorising only the final response.

• Check Your Preparation Without Notes

Once you have revised a topic, attempt its questions again without referring to notes or solutions. This gives you a clearer idea of which concepts you can handle independently and which ones need another revision.

The PW Chemistry Mid-Term Marathon can help you make your final preparation more exam-focused. By revising important concepts, attempting questions, and returning to topics where you make mistakes, you can use the session to close revision gaps and approach the mid-term with better clarity across the Chemistry syllabus.