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Most Common Viva Questions in Physics and Chemistry with Answers:: Viva exams are an essential part of practical assessments in Physics and Chemistry. These oral examinations test students’ understanding of concepts, their ability to apply knowledge, and their analytical skills. In this blog post, we will discuss some of the most common viva questions in Physics and Chemistry along with their answers.
Viva Questions for Class 12 Physics & Chemistry
Why it matters: Viva voce is crucial in Class 12 practical exams. It tests your conceptual grasp beyond just performing experiments.
What to expect: Expect questions related to experiment principles, applications, and underlying theory.
How to prepare:
- Thoroughly revise theory.
- Practice past year questions.
- Understand the “why” and “how” of concepts.
The Role of Viva Voce in Class 12 Science Practical Examinations
Viva Objectives:
- Conceptual Understanding: Test your grasp of fundamental concepts.
- Procedural Knowledge: Assess familiarity with experiment procedures and principles.
- Application Skills: Gauge your ability to apply theory to practical situations.
Preparation Tips:
- Revise Theory: Thoroughly review the theory behind experiments.
- Practice Questions: Practice past year viva questions.
- Focus on “Why” & “How”: Understand the rationale and methodology behind concepts.
Most Asked Viva Questions in Class 12 Physics Practical Exams
Physics practicals include experiments in optics, electricity, magnetism, and mechanics. Here are some frequently asked viva questions for Physics:
1. Optics
- How do concave mirrors and convex lenses work?
- What is focal length, and how do you find it?
- Why use the parallax method for lens focal length?
- What’s the difference between real and virtual images?
- Why use a convex lens as a magnifying glass?
2. Electricity
- What is Ohm’s Law, and how do you prove it?
- What is resistivity, and how does it change with temperature?
- What does a rheostat do in a circuit? 1
- Why use a Wheatstone bridge?
- What are the advantages of a potentiometer over a voltmeter?
3. Magnetism
- How does a galvanometer work?
- How do you find the magnetic field using a tangent galvanometer?
- What is magnetic flux?
- What affects the magnetic field in a solenoid?
4. General
- What are systematic and random errors?
- Why do optics experiments need dark rooms?
- What is the least count?
- Why take multiple readings in experiments?
Most Common Viva Questions in Physics and Chemistry with Answers
Most Asked Viva Questions in Class 12 Chemistry Practical Exams
Chemistry Viva Questions (Class 12)
1. Titrations
- What is titration? (Explaining it simply is key)
- Why do we use indicators?
- Why use phenolphthalein?
- What does the end point mean?
- Why clean the burette and pipette?
2. Qualitative Analysis
- What’s the difference between cations and anions?
- Why use ammonium hydroxide?
- How to find sulfate ions?
- What’s the flame test for?
- Why do some salts color the flame?
3. Salt Analysis
- What are group reagents?
- How to find carbonate ions?
- Why use dilute HCl?
- How to confirm chloride ions?
4. Chemical Reactions
- What is a redox reaction? (Simple explanation)
- What’s the difference between oxidation and reduction?
- Why is KMnO4 a self-indicator?
- Why use distilled water?
5. General Questions
- Safety rules for titration?
- Why use standard solutions?
- What’s the difference between molarity and normality?
- How do temperature and pressure affect reactions?
Remember: The best way to understand is to practice answering these questions out loud!
Most Common Viva Questions in Physics and Chemistry with Answers
Most Important Tips to Prepare for Viva
- Familiarize yourself thoroughly with the principles, procedures, and calculations for each experiment. Ensure you understand the purpose of every apparatus involved.
- Revise Concepts
Refresh your knowledge of theoretical concepts related to practicals, including key definitions, formulas, and derivations. - Refer to NCERT Lab Manuals
Use NCERT lab manuals as your primary study resource. They provide detailed, step-by-step explanations of experiments and commonly asked viva questions. - Be Honest
If you’re unsure about an answer, politely admit it rather than giving an incorrect response. - Review Previous Year Questions
Look over viva questions from previous school or board exams to get a sense of what examiners typically ask. - Stay Calm and Confident
Avoid letting nervousness cause unnecessary mistakes. Listen carefully to each question, and respond with confidence.
Most Common Viva Questions in Physics and Chemistry with Answers
Final Words
Viva exams can seem daunting, but with proper preparation, you can ace them with ease. Focus on understanding the principles behind the experiments rather than memorizing answers. Be confident in your approach, and don’t hesitate to clarify doubts with your teacher during the lab sessions.
Remember, the key to excelling in viva is not just theoretical knowledge but also the ability to apply it practically. All the best for your Class 12 Physics and Chemistry practical exams!
ALSO READ:: Class 12 Maths NCERT Solutions
FAQs related to Most Common Viva Questions in Physics and Chemistry with Answers:
1. How should I prepare for a Physics and Chemistry viva?
To prepare effectively, focus on understanding fundamental concepts rather than rote memorization. Revise key definitions, formulas, and laws. Practice explaining concepts aloud, and if possible, engage in mock viva sessions.
2. What are the most commonly asked topics in a viva exam?
Common topics in Physics include Newton’s Laws, Ohm’s Law, Work and Energy, Electricity, and the Doppler Effect. In Chemistry, frequent topics include the Periodic Table, Acids and Bases, Electrolysis, Redox Reactions, and pH concepts.
3. How can I handle difficult questions in a viva?
If you don’t know the answer, stay calm and try to logically deduce it based on related concepts. If unsure, politely ask for clarification or explain what you do know about the topic.
4. Is it necessary to remember all formulas in Physics and Chemistry?
Yes, but understanding their derivations and applications is more important. Knowing the context in which a formula is used will help you recall it more effectively.
5. How important is confidence in a viva exam?
Confidence plays a significant role. Even if you are unsure of an answer, responding clearly and logically can leave a positive impression on the examiner. Stay composed and answer to the best of your ability.
Most Common Viva Questions in Physics and Chemistry with Answers
I have to pass in praticals exam and even board exam also
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