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West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Chemistry Set 02 (Advanced Level) English Medium 100% Free Practice Test

West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Chemistry: Polymers Online Test (Set 02 (Advanced Level))

Polymers — Set 02 (Advanced Level)

Practise free online CBT mock test for West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Chemistry Chapter 6 'Polymers'. 20 MCQs, 20-minute timer, instant scorecard, and step-by-step solutions aligned with official board syllabus.

📝
20 MCQs
Questions
⏱️
20 Mins
Duration
🎯
20 Marks
Total Marks
➕
+1.0
Per Correct
🛡️
0.0
Negative Mark
🌐
English
Language
Start Test Now (English Medium)
Instant Scorecard Step-by-Step Solutions WBCHSE HS Syllabus Pattern

Chapter Study Guide & In-Depth Notes

Master the key concepts, vocabulary, and high-yield questions before starting the test.

3 Sections

Chapter Overview & Core Concepts: Polymers

Class 12 Study Guide

Mastering Polymers in Class 12 provides critical subject intuition, analytical skills, and examination readiness.

Examinations test fundamental principles, definitions, cause-and-effect reasoning, and real-world applications under timed conditions.

Core Moral & Key Takeaway:

Grasping core concepts and practicing with timed chapter-wise CBT tests guarantees top performance in board exams.

Key Terminology, Definitions & Principles

Glossary & Concepts
Term / Formula Type Definition / Meaning Explanation / Notes Example / Usage
Core Concept Principle Primary concept governing Polymers. मुख्य सिद्धांत "Understand and apply the principle accurately."
Analytical Deduction Skill Evaluating evidence to draw correct conclusions. तार्किक विश्लेषण "Examine question clues systematically."

Key Features & Devices Explored:

Systematic Elimination
Eliminate distractor choices before selecting the best answer.
Pacing & Accuracy
Complete each question within 60 seconds to maintain steady momentum.

High-Yield Revision Points & Solved Board Exam Q&A

Revision Notes
⚡ High-Yield Exam Takeaways:
  • Review all key textbook terms, definitions, and formulas.
  • Pay attention to units, boundary values, and key keywords in questions.
  • Solve Foundation Set 01 to build confidence, followed by Advanced Set 02 for exam excellence.
Frequently Asked Questions & Model Answers:
Q1 How should students prepare for Polymers exams?
Answer: Read the chapter thoroughly, practice step-by-step solved examples, memorize key definitions, and evaluate preparation using timed online CBT mock tests.

Sample Questions Preview

Free Sneak Peek

Here is a sneak peek of the questions included in this test set. Test your preparation by viewing the answer and detailed explanation before starting the timed exam.

Q1
What is the Ziegler-Natta Catalyst used for the coordination polymerization of ethene into High-Density Polythene (HDPE)?
হাই-ডেনসিটি পলিথিন (HDPE) প্রস্তুতিতে ব্যবহৃত জিগলার-নাটা অনুঘটকটি (Ziegler-Natta Catalyst) কী?
उच्च-घनत्व पॉलिथीन (एचडीपीई) में एथीन के समन्वय पोलीमराइजेशन के लिए ज़िग्लर-नट्टा उत्प्रेरक का उपयोग क्या किया जाता है?
A
Platinum on Carbonকার্বনে প্লাটিনামकार्बन पर प्लैटिनम
B
Nickel and Hydrogenনিকেল ও হাইড্রোজেনनिकेल और हाइड्रोजन
C
Iron and Molybdenumআয়রন ও মলিবডেনামलोहा और मोलिब्डेनम
D
Triethylaluminium and Titanium Tetrachloride: [Al(C_2H_5)₃ + TiCl_4]ট্রাইইথাইল অ্যালুমিনিয়াম এবং টাইটানিয়াম টেট্রাক্লোরাইড: [Al(C_2H_5)₃ + TiCl_4]ट्राइएथिल्युमिनियम और टाइटेनियम टेट्राक्लोराइड: [Al(C_2H_5)₃ + TiCl_4]
Correct Answer: Option D
Explanation:
Ziegler-Natta catalyst [TiCl_4 + Al(C_2H_5)₃] operates at mild conditions (333–343 K, 6–7 atm) to synthesize linear unbranched High-Density Polyethylene (HDPE) with high density and tensile strength.
জিগলার-নাটা অনুঘটকের উপস্থিতিতে কম চাপে ও তাপমাত্রায় রৈখিক ও ঘনসন্নিবিষ্ট উচ্চ ঘনত্বের পলিথিন (HDPE) তৈরি হয়।
ज़िग्लर-नट्टा उत्प्रेरक [TiCl_4 + Al(C_2H_5)₃] उच्च घनत्व और तन्यता ताकत के साथ रैखिक अशाखित उच्च-घनत्व पॉलीथीन (एचडीपीई) को संश्लेषित करने के लिए हल्के परिस्थितियों (333-343 K, 6-7 एटीएम) पर काम करता है।
Q2
What is the structural difference between Low-Density Polythene (LDPE) and High-Density Polythene (HDPE)?
লো-ডেনসিটি পলিথিন (LDPE) এবং হাই-ডেনসিটি পলিথিনের (HDPE) মধ্যে কাঠামোগত পার্থক্য কী?
निम्न-घनत्व पॉलिथीन (एलडीपीई) और उच्च-घनत्व पॉलिथीन (एचडीपीई) के बीच संरचनात्मक अंतर क्या है?
A
LDPE is crystalline; HDPE is a gasLDPE কেলাসিত; HDPE গ্যাসएलडीपीई क्रिस्टलीय है; एचडीपीई एक गैस है
B
LDPE has extensively branched chains with low density and low melting point (free radical mechanism at 1000-2000 atm); HDPE has linear unbranched closely packed chains (coordination mechanism at 6-7 atm)LDPE হলো শাখান্বিত শৃঙ্খলযুক্ত নিম্ন ঘনত্বের পলিমার; HDPE হলো সরল রৈখিক ঘনসন্নিবিষ্ট শৃঙ্খলযুক্ত পলিমারएलडीपीई में कम घनत्व और कम पिघलने बिंदु (1000-2000 एटीएम पर मुक्त कण तंत्र) के साथ बड़े पैमाने पर शाखाबद्ध श्रृंखलाएं हैं; एचडीपीई में रैखिक अशाखित बारीकी से पैक की गई श्रृंखलाएं हैं (6-7 एटीएम पर समन्वय तंत्र)
C
HDPE contains chlorineHDPE তে ক্লোরিন থাকেएचडीपीई में क्लोरीन होता है
D
LDPE has a cross-linked networkLDPE তে ক্রস-বন্ধন থাকেएलडीपीई के पास एक क्रॉस-लिंक्ड नेटवर्क है
Correct Answer: Option B
Explanation:
LDPE is prepared under extreme pressure via free radicals, yielding highly branched chains that pack poorly (low density). HDPE is prepared via Ziegler-Natta catalyst, yielding linear chains with high crystallinity and melting point.
LDPE-তে মুক্ত মূলক ক্রিয়ায় প্রচুর শাখা তৈরি হওয়ায় ঘনত্ব কম হয়; পক্ষান্তরে HDPE-তে রৈখিক শৃঙ্খল সুন্দরভাবে সন্নিবিষ্ট থাকে।
एलडीपीई मुक्त कणों के माध्यम से अत्यधिक दबाव में तैयार किया जाता है, जिससे अत्यधिक शाखाओं वाली श्रृंखलाएं बनती हैं जो खराब तरीके से पैक होती हैं (कम घनत्व)। एचडीपीई ज़िग्लर-नट्टा उत्प्रेरक के माध्यम से तैयार किया जाता है, जो उच्च क्रिस्टलीयता और पिघलने बिंदु के साथ रैखिक श्रृंखलाएं उत्पन्न करता है।

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Focused chapter-wise CBT practice builds the speed, mental stamina, and analytical discipline required to ace CUET, JEE Main, NEET UG, NDA, CA Foundation, and College Entrance Exams.

Competitive Edge

Real-Time Clock Awareness & Pacing

समय प्रबंधन एवं गति नियंत्रण

In school examinations, students write answers without active pacing. In national entrance tests, students have barely 45-60 seconds per MCQ. Practicing with a 20-minute timer instills instinctive time-budgeting and prevents last-minute exam panic.

Mastery of the Elimination Technique

विकल्प निष्कासन विधि में दक्षता

Top rankers in competitive exams rarely compute every problem blindly. They spot subtle traps, evaluate extreme values, and eliminate 2 out of 4 distractors within seconds. Our 4-option sets teach critical distractor analysis.

CBT Screen Stamina & Digital Comfort

कंप्यूटर आधारित परीक्षा का सहज अभ्यास

Almost all major national exams (CUET, JEE, NEET, SSC, Banking) are 100% computer-based. Students who only study on paper experience eye strain and navigation mistakes on exam day. Early CBT practice creates effortless digital fluency.

Immunity to Negative Marking

सटीकता और नकारात्मक अंकन से सुरक्षा

Careless errors—such as misreading "NOT" or "EXCEPT"—ruin thousands of competitive aspirations each year. Regular objective testing builds the habit of double-checking question keywords before locking answers.

Instant Diagnostic Feedback Loop

तत्काल त्रुटि निवारण एवं आत्म-मूल्यांकन

Traditional paper tests take weeks to grade, by which time the student has forgotten their thought process. TargetExams provides instant scorecards and step-by-step solutions while the conceptual puzzle is still fresh.

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Syllabus Concepts Evaluated in this Chapter

This test series specifically evaluates the core competencies and learning objectives outlined in the official syllabus:

  • Core definitions, fundamental theorems, and essential concepts of this chapter.
  • Step-by-step mathematical reasoning and deductive problem-solving.
  • Application of standard formulas and operations in real-world scenarios.
  • Critical examination of common exam pitfalls and misleading options.
  • Higher-order thinking skill (HOTS) questions to prepare for school examinations.
  • Speed and accuracy mastery under standard timed CBT exam conditions.

Exam Rules & Test Taking Guidelines

  • Total Questions: The test consists of exactly 20 objective type questions.
  • Time Allowed: 20 Minutes countdown timer begins as soon as the test launches.
  • Marking Scheme: +1.0 mark is awarded for each correct answer.
  • Zero Penalty: There is 0.0 negative marking for incorrect or unattempted questions.
  • Question Palette: Freely navigate between questions and flag questions for later review.
  • Review & Solutions: Access instant scorecard and full step-by-step solutions upon submission.

Frequently Asked Questions (FAQs)

Yes! Foundation Practice Set 01 for every chapter in West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Chemistry is 100% free to attempt. Students can test their preparation without any subscription or payment.
This test strictly follows the official West Bengal Council of Higher Secondary Education (WBCHSE) syllabus and curriculum for Class 12 (Higher Secondary), covering textbook concepts, formulas, and board-standard MCQs for Chapter 6.
This dedicated test page is conducted in English Medium. If you prefer taking the test in Bengali or Hindi, you can switch using the language switcher bar at the top or toggle languages during the exam.
The test comprises 20 MCQs to be completed in 20 minutes. Each question carries +1.0 mark for a correct response, and there is 0.0 negative marking for incorrect or unattempted questions.
Yes! Instantly after submitting your test, you receive a comprehensive digital scorecard with accuracy analysis, time breakdown, and step-by-step verified explanations for all 20 questions.

Practice Sets in this Chapter

Set 01 (Foundation)

20 MCQs • 20 Mins
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Set 02 (Advanced)

20 MCQs • 20 Mins
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More Chapters in this Subject

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Polymers (Set 02 (Advanced Level))
20 MCQs • 20 Mins • 100% Free Practice Test

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