12th Chemistry Chapter 2 – 3 Mark Questions (Important & Repeated – TN Board)
Prepare for exams with 12th Chemistry Chapter 2 (p-Block Elements-I) important 3 mark questions. This collection includes most repeated and previously asked questions based on TN Board exams, helping students revise key concepts quickly and score better.
p-Block Elements-I – 3 Mark Questions
Most Repeated 3 Marks
Note : Number next to questions tells, how many times it has been repeated in past few years
1.Write the preparation of Borazole / inorganic benzene? (4)
When diborane treated with excess ammonia at low temperatures diborane gives diboranediammonate. On heating at higher temperatures it gives borazole.
2.What is catenation? describe briefly the catenation property of carbon? (4)
Catenation is an ability of an element to form chain of atoms.
Catenation property of carbon.
- The valency of element is greater than or equal to two,
- Element should have an ability to bond with itself
- The self bond must be as strong as its bond with other elements
- kinetic inertness of catenated compound towards other molecules.
Carbon possesses all the above properties and forms a wide range of compounds with itself and with other elements such as H, O, N, S and halogen
3.Write a short note on anomalous properties of the first element of p-Block? (2)
The following factors are responsible for this anomalous behaviour.
- Small size of the first member
- High ionisation enthalpy and high electronegativity
- Absence of d orbitals in their valance shell
4.Explain Mcafee process? (2)
Aluminium chloride is obtained by heating a mixture of alumina and coke in a current of chlorine.
On industrial scale it is prepared by chlorinating aluminium around 1000 K
12th Chemistry Chapter 2 Important 3 Marks Questions
Welcome to our collection of 12th Chemistry Chapter 2 Important 3 Marks Questions and Answers prepared from previous year public question papers and repeated board exam questions. These important questions are highly useful for Tamil Nadu State Board Class 12 students preparing for public examinations, revision tests, and school examinations.
Chapter 2 contains several conceptual and theory-based questions that are frequently asked in Tamil Nadu board examinations. Practicing important 3 mark questions regularly helps students improve conceptual understanding, answer presentation skills, and exam confidence.
Most Repeated 3 Mark Questions
- Preparation of Borazole (Inorganic Benzene)
- Catenation Property of Carbon
- Anomalous Properties of the First Element of p-Block
- McAfee Process
Benefits of Practicing 3 Mark Questions
- Improves conceptual clarity
- Helps understand important theory topics
- Covers repeated board exam questions
- Enhances answer writing skills
- Useful for quick public exam revision
Previous Year Public Exam Questions
The important 3 mark questions provided here are collected from previous year Tamil Nadu 12th Chemistry public question papers and important repeated board examination questions. These questions are often asked directly or indirectly in public examinations and school tests.
Students are advised to practice writing answers with proper explanations, chemical equations, and important points to score maximum marks in the board examination.
More 12th Chemistry Study Materials
Explore more useful Class 12 Chemistry study resources:
- Important 1 Mark Questions
- 2 Marks and 5 Marks Questions
- Book Back Answers
- Chapter Wise Notes
- Most Expected Questions
- Public Exam Study Materials
- Previous Year Question Papers with Answers
Regular revision of important 3 mark questions helps students gain confidence and perform well in the 12th Chemistry public examination.
