Class 12^th Chemistry Assertion and Reason Question with Solution

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CBSE Class 12 Chemistry Assertion and Reason

Master CBSE Class 12 Chemistry Assertion and Reason questions with our comprehensive guide. These types of questions are crucial for assessing your conceptual understanding and reasoning skills in Physical, Organic, and Inorganic Chemistry. Our page provides detailed Assertion and Reason practice questions along with solutions, helping you prepare effectively for the CBSE Class 12 Chemistry exam. Improve your exam readiness by mastering the key strategies to solve these questions accurately and efficiently. Whether you're revising for the board exams or preparing for competitive exams, this resource is perfect for building confidence and boosting your Chemistry knowledge.

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Class XII Chemistry Assertion and Reason 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 Assertion and Reason: Practice Questions and Solutions

Preparing for CBSE Class 12 Chemistry can be challenging, especially when it comes to understanding Assertion and Reason questions. These types of questions test your conceptual clarity and logical reasoning skills. This article will help you tackle CBSE Class 12 Chemistry Assertion and Reason questions with ease, providing you with valuable insights, practice questions, and detailed solutions to boost your preparation for the CBSE Class 12 Chemistry exams.

What are Assertion and Reason Questions?

In CBSE Chemistry Assertion and Reason questions, you are given two statements: an assertion (A) and a reason (R). You need to determine whether both statements are true and whether the reason correctly explains the assertion. These questions assess your understanding of concepts and your ability to logically connect them.

Importance of Assertion and Reason Questions in CBSE Class 12 Chemistry

Assertion and Reason questions are commonly found in the CBSE Class 12 Chemistry exam. They focus on various chapters, including Physical, Organic, and Inorganic Chemistry. These types of questions are particularly important for board exam preparation as they can test both your factual knowledge and application skills.

How to Solve Assertion and Reason Questions for CBSE Class 12 Chemistry

Here are some essential tips to help you solve these questions effectively:

1. Read Both Statements Carefully: Start by reading the assertion and reason statements. Make sure you understand each concept.


2. Check the Truth Value: Determine whether both the assertion and reason are true or false.


3. Analyze the Explanation: If both are true, check if the reason accurately explains the assertion.


4. Eliminate Incorrect Options: Eliminate choices that are clearly wrong based on the statements you analyzed.

Practice Assertion and Reason Questions

To help you prepare, we’ve compiled a list of CBSE Class 12 Chemistry Assertion and Reason questions along with detailed solutions. These questions will give you an opportunity to practice and improve your skills.

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Q1: Assertion: The rate of a chemical reaction doubles when the temperature is raised by 10°C.

Reason: The rate constant of a reaction increases by a factor of two for every 10°C rise in temperature.

Answer:

1. Assertion: True


2. Reason: True


3. Explanation: The rate constant typically doubles for every 10°C increase in temperature, a phenomenon known as the Arrhenius equation.

Q2: Assertion: Oxygen has a higher electronegativity than nitrogen.

Reason: Electronegativity increases across a period from left to right.

Answer:

1. Assertion: True


2. Reason: True


3. Explanation: Oxygen, being further to the right in the periodic table, has a higher electronegativity than nitrogen. This follows the general trend of electronegativity increasing from left to right across periods.

Q3: Assertion: Ethanol is soluble in water due to hydrogen bonding.

Reason: The hydroxyl group in ethanol forms hydrogen bonds with water molecules.

Answer:

1. Assertion: True


2. Reason: True


3. Explanation: Ethanol is soluble in water due to the formation of hydrogen bonds between the hydroxyl group of ethanol and the water molecules.

Q4: Assertion: An ideal gas obeys the gas laws at all temperatures and pressures.

Reason: The ideal gas law is a mathematical model that assumes no intermolecular forces.

Answer:

1. Assertion: False


2. Reason: True


3. Explanation: The ideal gas law assumes no intermolecular forces and works best under low pressure and high temperature conditions. At very low temperatures or high pressures, gases deviate from ideal behavior.

Q5: Assertion: In an electrophilic aromatic substitution reaction, the electrophile attacks the aromatic ring.

Reason: The π-electrons of the aromatic ring act as a nucleophile in the reaction.

Answer:

1. Assertion: True


2. Reason: True


3. Explanation: In electrophilic aromatic substitution, the electrophile attacks the aromatic ring, and the π-electrons act as a nucleophile, facilitating the reaction.

Why Practice Assertion and Reason Questions?

Practicing Assertion and Reason questions for Class 12 Chemistry is crucial because it helps you:

1. Develop a deeper understanding of concepts.


2. Enhance your reasoning and analytical skills.


3. Increase your accuracy in answering board exam questions.


4. Improve time management skills for the CBSE Chemistry exam.

These questions also form a significant part of competitive exams like NEET and JEE, making them vital for anyone looking to pursue higher studies in Chemistry.

Mastering CBSE Class 12 Chemistry Assertion and Reason questions is essential for your exam preparation. By practicing these questions regularly, you’ll be able to grasp difficult concepts and apply them logically in exams. Keep practicing chapter-wise Assertion and Reason questions to build your confidence and ensure success in your CBSE Class 12 Chemistry exams.