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Polymers WBCHSE Class 12 MCQ & Practice Questions

Practice Polymers MCQs for WBCHSE Class 12 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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Polymers Revision Guide for WBCHSE Class 12 Chemistry

Polymers is part of WBCHSE Class 12 Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Polymers, then test recall with mixed MCQs.

What to practise in Polymers

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Polymers before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for WBCHSE Class 12 Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 Polymers MCQs with Answers

These public questions are selected from the exact Polymers chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

WBCHSE Class 12 Chemistry · Polymers · Very Hard

1. Polyethylene কোন ধরনের polymerization-এ তৈরি হয়?

  • A. Addition
  • B. Condensation
  • C. Hydrolysis
  • D. Oxidation
Answer: A
Explanation: Ethene monomer-এর double bond খুলে chain-growth addition polymerization-এ polyethylene তৈরি হয়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

2. Nylon-6,6 কোন ধরনের polymer?

  • A. Addition polymer
  • B. Condensation polymer
  • C. Natural polymer
  • D. Polysaccharide
Answer: B
Explanation: Hexamethylenediamine ও adipic acid condensation-এ polyamide nylon-6,6 তৈরি হয়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

3. Bakelite কী?

  • A. Thermoplastic
  • B. Thermosetting phenol-formaldehyde polymer
  • C. Elastomer
  • D. Protein
Answer: B
Explanation: Phenol-formaldehyde cross-linked polymer Bakelite thermosetting।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

4. Natural rubber-এর monomer কী?

  • A. Ethene
  • B. Isoprene
  • C. Styrene
  • D. Vinyl chloride
Answer: B
Explanation: Natural rubber হলো cis-1,4-polyisoprene।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

5. Vulcanization-এ rubber-এর সঙ্গে প্রধানত কী যোগ করা হয়?

  • A. Sulfur
  • B. NaCl
  • C. Glucose
  • D. Al2O3
Answer: A
Explanation: Sulfur cross-links polymer chains, ফলে strength ও elasticity বৃদ্ধি পায়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

6. PVC-এর monomer কী?

  • A. Vinyl chloride
  • B. Vinyl acetate
  • C. Styrene
  • D. Tetrafluoroethene
Answer: A
Explanation: PVC = poly(vinyl chloride), monomer CH2=CHCl।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

7. PTFE/Teflon-এর monomer কী?

  • A. CF2=CF2
  • B. CH2=CH2
  • C. CH2=CHCl
  • D. C6H5CH=CH2
Answer: A
Explanation: Tetrafluoroethene addition polymerization-এ PTFE তৈরি হয়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

8. Polystyrene-এর monomer কোনটি?

  • A. Styrene
  • B. Ethylene glycol
  • C. Adipic acid
  • D. Caprolactam
Answer: A
Explanation: Styrene (vinyl benzene) polymerize হয়ে polystyrene দেয়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

9. Copolymer কী?

  • A. একই monomer-এর polymer
  • B. দুই বা ততোধিক monomer species থেকে polymer
  • C. শুধু natural polymer
  • D. কেবল protein
Answer: B
Explanation: Copolymerization-এ দুই বা ততোধিক ভিন্ন monomer এক polymer chain-এ যুক্ত হয়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

10. Buna-S কোন monomer pair থেকে তৈরি?

  • A. Butadiene + styrene
  • B. Butadiene + acrylonitrile
  • C. Ethene + propene
  • D. Phenol + formaldehyde
Answer: A
Explanation: Buna-S হলো 1,3-butadiene ও styrene-এর copolymer।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

11. Buna-N কোন monomer pair?

  • A. Butadiene + styrene
  • B. Butadiene + acrylonitrile
  • C. Isoprene + sulfur
  • D. Ethene + vinyl chloride
Answer: B
Explanation: Buna-N/nitrile rubber 1,3-butadiene ও acrylonitrile-এর copolymer।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

12. Neoprene-এর monomer?

  • A. Chloroprene
  • B. Isoprene
  • C. Styrene
  • D. Acrylonitrile
Answer: A
Explanation: Neoprene হলো polychloroprene।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

13. Polyester-এ characteristic linkage?

  • A. –CO–O–
  • B. –CO–NH–
  • C. –S–S–
  • D. –C≡N
Answer: A
Explanation: Polyester backbone-এ ester linkage –CO–O– থাকে।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

14. Polyamide-এ characteristic linkage?

  • A. –CO–O–
  • B. –CO–NH–
  • C. –O–O–
  • D. –C=C–
Answer: B
Explanation: Nylon-এর মতো polyamide-এ amide linkage –CO–NH– থাকে।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

15. Thermoplastic polymer-এর বৈশিষ্ট্য?

  • A. Heat দিলে soft হয়ে পুনর্গঠনযোগ্য
  • B. Heat দিলে irreversible crosslink
  • C. সব natural
  • D. সব biodegradable
Answer: A
Explanation: Thermoplastic-এ linear/branched chains; heating-এ soften এবং cooling-এ hard হয়।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

16. Thermosetting polymer-এর বৈশিষ্ট্য?

  • A. বারবার melt করা যায়
  • B. cross-linked structure ও reheating-এ melt হয় না
  • C. শুধু gas
  • D. low molecular mass
Answer: B
Explanation: Thermoset curing-এ 3D cross-linked network তৈরি হয়; পুনরায় melt করা যায় না।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

17. Biodegradable polymer-এর একটি বৈশিষ্ট্য?

  • A. Microorganism দ্বারা breakdown হতে পারে
  • B. কখনও degrade হয় না
  • C. শুধু metal
  • D. কেবল addition polymer
Answer: A
Explanation: Biodegradable polymer biological processes-এ তুলনামূলক harmless products-এ ভাঙতে পারে।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

18. Natural polymer কোনটি?

  • A. Nylon-6,6
  • B. Cellulose
  • C. PVC
  • D. Teflon
Answer: B
Explanation: Cellulose উদ্ভিদজাত natural polysaccharide polymer।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

19. Synthetic polymer কোনটি?

  • A. Protein
  • B. Starch
  • C. PVC
  • D. Cellulose
Answer: C
Explanation: PVC শিল্পে প্রস্তুত synthetic addition polymer।

WBCHSE Class 12 Chemistry · Polymers · Very Hard

20. Elastomer-এর প্রধান বৈশিষ্ট্য?

  • A. উচ্চ elastic deformation ও recovery
  • B. খুব brittle
  • C. কেবল crystalline
  • D. দ্রুত hydrolysis
Answer: A
Explanation: Elastomer সাময়িকভাবে অনেক প্রসারিত হয়ে stress সরালে shape recover করে।

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Polymers Practice Tests

Polymers Frequently Asked Questions

How should I prepare Polymers for WBCHSE Class 12 Chemistry?

Revise the core concepts first, make a short list of important relationships or exceptions, and then solve chapter-focused MCQs while reviewing every error.

How can ChemNexa help with Polymers practice?

This page provides public sample questions and links to published ChemNexa tests so you can combine quick revision with structured practice.

What should I do after getting an MCQ wrong?

Identify whether the mistake came from a concept gap, calculation, unit, sign, wording or memory error, review that point, and then attempt a similar question again.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

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