12th Chemistry Chapter 3 – 3 Mark Questions (Important & Repeated – TN Board)
Prepare for exams with 12th Chemistry Chapter 3 (p-Block Elements-II) 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-II – 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.Prove Sulphuric acid is dehydrating agent? (3)
- It is highly soluble in water and has strong affinity towards water and hence it can be used as a dehydrating agent
- When dissolved in water, it forms mono (H2SO4 .H2O) and dihydrates (H2SO4 .2H2O) and the reaction is exothermic.
2.Test for sulphuric acid? (2)
Dilute solution of sulphuric acid/aqueous solution of sulphates gives white precipitate (barium sulphate) with barium chloride solution. It can also be detected using lead acetate solution. Here a white precipitate of lead sulphate is obtained.
3.What are interhalogen compounds? Give example (2)
- Each halogen combines with other halogens to form a series of compounds called inter halogen compounds.
- ClF ,ClF3,BrF, BrF3,IF,IF7
4.Explain the action of heat on pcl5? (2)
On heating phosphorous pentachloride, it decomposes into phosphorus trichloride and chlorine.
12th Chemistry Chapter 3 p-Block Elements-II Important 3 Marks Questions
Welcome to our collection of 12th Chemistry Chapter 3 p-Block Elements-II Important 3 Marks Questions and Answers prepared from previous year public question papers and important repeated board exam questions. These questions are highly useful for Tamil Nadu State Board Class 12 students preparing for public examinations, revision tests, and school examinations.
The chapter p-Block Elements-II contains several important theory-based concepts related to halogens, noble gases, oxoacids, phosphorus compounds, and interhalogen compounds. Many direct and repeated 3 mark questions are frequently asked from this chapter in board examinations.
Most Repeated 3 Mark Questions
- Sulphuric Acid as a Dehydrating Agent
- Test for Sulphuric Acid
- Interhalogen Compounds
- Action of Heat on PCl5
Benefits of Practicing 3 Mark Questions
- Improves conceptual understanding
- Helps in public exam preparation
- Covers repeated board exam questions
- Enhances answer presentation skills
- Useful for quick revision before exams
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 frequently asked in public examinations, school tests, and revision exams.
Students are advised to practice writing answers with proper chemical equations, definitions, and important points to score maximum marks in the 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 practice of important questions from p-Block Elements-II helps students improve confidence and score high marks in the 12th Chemistry public examination.
