Class 12^th Chemistry Important Question with Solution

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CBSE Class 12 Chemistry Important Questions

Prepare effectively for CBSE Class 12 Chemistry with important questions designed for board exams, NEET, and JEE. Our comprehensive collection includes chapter-wise key questions, MCQs, and detailed solutions to help you master critical topics in Physical, Organic, and Inorganic Chemistry. Enhance your exam readiness and boost your problem-solving skills with these expert-curated questions.

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Class XII Chemistry Important Questions with Solution

Chapter 1 The Solid State
Chapter 2 Solutions
Chapter 3 Electrochemistry
Chapter 4 Chemical Kinetics
Chapter 5 Surface Chemistry
Chapter 6 General Principles and Processes of Isolation of Elements
Chapter 7 The p- Block Elements
Chapter 8 The d and f Block Elements
Chapter 9 Coordination Compounds
Chapter 10 Haloalkanes and Haloarenes
Chapter 11 Alcohols, Phenols and Ethers
Chapter 12 Aldehydes, Ketones and Carboxylic Acids
Chapter 13 Organic Compounds Containing Nitrogen (Amines)
Chapter 14 Biomolecules
Chapter 15 Polymers
Chapter 16 Chemistry in Everyday Life

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CBSE Class 12 Chemistry Important Questions

Introduction to CBSE Class 12 Chemistry Important Questions

As students approach their CBSE Class 12 Chemistry exams, focusing on important questions is crucial to achieving a high score. Class 12 Chemistry is a challenging subject that covers a wide range of topics in Physical Chemistry, Organic Chemistry, and Inorganic Chemistry. To make sure students are fully prepared for the board exams, competitive exams like JEE and NEET, and other entrance tests, solving important questions is a highly effective strategy.

In this article, we will highlight the most important questions for CBSE Class 12 Chemistry, covering key chapters, and offering practice sets for board exam preparation. These questions have been carefully selected to help you tackle the toughest sections of Chemistry and ensure you are exam-ready.

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Why Important Questions Matter in CBSE Class 12 Chemistry

CBSE Class 12 Chemistry important questions are crucial for several reasons:

1. Focused Learning: By practicing key questions, students can focus on the most essential topics and avoid spending too much time on less critical areas.


2. Better Exam Strategy: Knowing which questions are most likely to appear in the board exams allows students to strategize their revision and study more effectively.


3. Boost Confidence: Regularly solving important Chemistry questions will help build confidence, reducing exam-related stress.


4. Improved Performance in JEE and NEET: Many of the important questions for Class 12 Chemistry are similar to the ones in JEE and NEET, making them an excellent practice resource for these competitive exams.

By incorporating these important questions into your CBSE Class 12 Chemistry exam preparation, you’ll enhance your understanding and ensure you are well-prepared for the Chemistry board exam and other entrance tests.

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Types of Important Questions for Class 12 Chemistry

The important questions for CBSE Class 12 Chemistry are categorized based on the type of problems encountered in the exam:

1. Chapter-wise Important Questions: These questions are broken down by chapters such as Electrochemistry, Aldehydes, Ketones and Carboxylic Acids, p-Block Elements, and The Solid State. Chapter-wise important questions help students focus on one topic at a time.




2. MCQs and Objective Questions: Multiple Choice Questions (MCQs) are common in both board exams and competitive exams like NEET and JEE. Practicing these helps students get familiar with the exam format.




3. Short Answer Questions: These questions test students' ability to explain concepts in brief and are a regular part of the CBSE Chemistry exam.




4. Long Answer Questions: These questions require detailed explanations and calculations, testing the student's deep understanding of a topic.




5. Numerical Problems: Physical Chemistry often includes numerical problems based on topics like Mole Concept, Chemical Kinetics, and Electrochemistry. Solving these is crucial for mastering the subject.

Top 5 Important Questions for CBSE Class 12 Chemistry

Here are five sample important questions for Class 12 Chemistry that cover key topics:

Q1: What is the difference between oxidation and reduction? Provide examples.
A1:
Oxidation is the loss of electrons, whereas reduction is the gain of electrons. For example:

1. Oxidation: 2Na → 2Na⁺ + 2e⁻ (Sodium loses electrons)


2. Reduction: Cl₂ + 2e⁻ → 2Cl⁻ (Chlorine gains electrons)

Q2: What is the law of mass action in Chemical Kinetics?
A2:
The law of mass action states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to the power of their respective stoichiometric coefficients. For a reaction $aA + bB → cC + dD$ , the rate law is:
Rate = $k[A]^a[B]^b$

Q3: Explain the structure of the benzene molecule using the concept of resonance.
A3:
Benzene has a six-membered carbon ring with alternating single and double bonds. However, the electrons are not localized but are delocalized across the ring, forming a resonance structure. This gives benzene its unique stability, known as aromatic stability.

Q4: What are isomerism and the different types of isomerism in organic compounds?
A4:
Isomerism refers to the phenomenon where compounds have the same molecular formula but different structures or spatial arrangements. The main types of isomerism include:

1. Structural Isomerism: Compounds with the same molecular formula but different structures (e.g., chain, position, functional group isomerism).


2. Stereo-isomerism: Isomers with the same structural formula but different spatial arrangements (e.g., geometric and optical isomerism).

Q5: How does the solubility of a substance in a solvent depend on temperature?
A5:
Generally, the solubility of solids in liquids increases with temperature. However, for gases, solubility decreases with an increase in temperature. This is because higher temperatures provide more energy to the molecules, making it harder for gas molecules to dissolve.

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How to Use CBSE Class 12 Chemistry Important Questions for Exam Preparation

To make the most of the important questions:

1. Create a Study Plan: Schedule regular time for each chapter’s important questions. Break down the chapters into smaller sections and practice questions regularly.


2. Revise Regularly: Keep revising the key important questions for Class 12 Chemistry even if you feel confident. Regular practice ensures retention.


3. Take Mock Tests: Simulate exam conditions by practicing previous year questions or sample papers to get familiar with the exam format.


4. Use Solutions: If you’re stuck on any question, check out detailed solutions for the important questions to understand the problem-solving method.

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Solving CBSE Class 12 Chemistry important questions is a crucial part of exam preparation. Whether you're preparing for the board exams, NEET, or JEE, these questions will help you strengthen your understanding of key Physical, Organic, and Inorganic Chemistry topics. With the right approach and consistent practice, you can ensure success in your Chemistry exam. Make sure to practice MCQs, short answer, and long answer questions regularly to improve your problem-solving speed and accuracy. Happy studying, and good luck with your exams