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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: Coordination Compounds Online Test (Set 02 (Advanced Level))

Coordination Compounds — 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 10 'Coordination Compounds'. 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
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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: Coordination Compounds

Class 12 Study Guide

Mastering Coordination Compounds 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 Coordination Compounds. 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 Coordination Compounds 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 Facial (fac-) and Meridional (mer-) Geometrical Isomerism in octahedral complexes of the type [Ma_3b_3] (e.g., [Co(NH_3)₃(NO_2)₃])?
ধরনের অষ্টতলকীয় জটিল যৌগে (যেমন [Co(NH_3)₃(NO_2)₃]) ফেসিয়াল (fac-) এবং মেরিডিওনাল (mer-) সমাবয়বতা বলতে কী বোঝায়?
(जैसे, [Co(NH_3)₃(NO_2)₃]) प्रकार के अष्टफलकीय परिसरों में फेशियल (fac-) और मेरिडियनल (mer-) ज्यामितीय आइसोमेरिज्म क्या है?
A
Fac-isomer is tetrahedralfac-আইসোমার চতুস্তলকীয়फैक-आइसोमर चतुष्फलकीय है
B
Mer-isomer is square planarmer-আইসোমার বর্গাকার সমতলীয়मेर-आइसोमर वर्गाकार तलीय है
C
Both are optically activeউভয়ই আলোক-সক্রিয়दोनों प्रकाशिक रूप से सक्रिय हैं
D
Fac-isomer: Three identical donor atoms occupy the corners of the SAME triangular face of the octahedron; Mer-isomer: Three identical donor atoms lie along a meridian plane encircling the centerfac-সমাবয়বে তিনটি সমান লিগ্যান্ড অষ্টতলকের একই ত্রিভুজীয় তলে থাকে; mer-সমাবয়বে এরা অষ্টতলকের পরিধি বরাবর মধ্যরেখা তলে অবস্থান করেफेस-आइसोमर: तीन समान दाता परमाणु ऑक्टाहेड्रोन के समान त्रिकोणीय चेहरे के कोनों पर कब्जा कर लेते हैं; मेर-आइसोमर: तीन समान दाता परमाणु केंद्र को घेरे हुए एक मेरिडियन विमान के साथ स्थित होते हैं
Correct Answer: Option D
Explanation:
In fac-[Ma_3b_3], identical ligands are at positions (1,2,3) sharing an octahedral face. In mer-[Ma_3b_3], identical ligands occupy positions (1,2,6) on an equatorial meridian plane.
fac-আইসোমারে ৩টি লিগ্যান্ড অষ্টতলকের একটি নির্দিষ্ট তল দখল করে, আর mer-আইসোমারে এরা পরিধি বরাবর সমতলে অবস্থান করে।
fac-[Ma_3b_3] में, समान लिगेंड एक अष्टफलकीय फलक साझा करते हुए स्थिति (1,2,3) पर हैं। मेर-[Ma_3b_3] में, समान लिगेंड भूमध्यरेखीय मेरिडियन विमान पर स्थिति (1,2,6) पर कब्जा करते हैं।
Q2
Which of the following octahedral complexes exhibits OPTICAL ISOMERISM (Chirality with non-superimposable mirror images)?
নিচের কোন অষ্টতলকীয় জটিল আয়নটি আলোক সমাবয়বতা (Optical Isomerism) প্রদর্শন করে?
निम्नलिखित में से कौन सा ऑक्टाहेड्रल कॉम्प्लेक्स ऑप्टिकल आइसोमेरिज़्म (गैर-सुपरइम्पोज़ेबल दर्पण छवियों के साथ चिरलिटी) प्रदर्शित करता है?
A
trans-[Co(en)₂Cl_2]⁺ (possesses an internal plane of symmetry)trans-[Co(en)₂Cl_2]⁺ (প্রতিসাম্যের একটি অভ্যন্তরীণ সমতল রয়েছে)ट्रांस-[Co(en)₂Cl_2]⁺ (समरूपता का एक आंतरिक तल रखता है)
B
cis-[Co(en)₂Cl_2]⁺ and [Co(en)₃]³⁺ (lack plane of symmetry)cis-[Co(en)₂Cl_2]⁺ এবং [Co(en)₃]³⁺ (প্রতিসাম্য তল অনুপস্থিত থাকায়)सीस-[Co(en)₂Cl_2]⁺ और [Co(en)₃]³⁺ (समरूपता के तल का अभाव)
C
[Co(NH_3)₆]³⁺
D
[Pt(NH_3)₂Cl_2][पं(NH_3)₂Cl_2]
Correct Answer: Option B
Explanation:
cis-[Co(en)₂Cl_2]⁺ and [Co(en)₃]³⁺ are chiral molecules lacking any plane/center of symmetry, existing as dextro (+) and laevo (-) enantiomers. trans-[Co(en)₂Cl_2]⁺ has a plane of symmetry (optically inactive).
cis-[Co(en)₂Cl_2]⁺ এবং [Co(en)₃]³⁺-এ কোনো প্রতিসাম্য তল না থাকায় এরা আলোক-সক্রিয় এনানশিওমার গঠন করে।
सीआईएस-[Co(en)₂Cl_2]⁺ और [Co(en)₃]³⁺ चिरल अणु हैं जिनमें किसी समतल/समरूपता के केंद्र का अभाव है, जो डेक्सट्रो (+) और लेवो (-) एनैन्टीओमर्स के रूप में विद्यमान हैं। trans-[Co(en)₂Cl_2]⁺ में समरूपता का एक तल (ऑप्टिकल रूप से निष्क्रिय) होता है।

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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 10.
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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Coordination Compounds (Set 02 (Advanced Level))
20 MCQs • 20 Mins • 100% Free Practice Test

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