.png "12th-HSC-Chemistry-Coordination-Compounds-Previous-Year-Questions")
12th HSC Chemistry Coordination Compounds Previous Year Questions
Target: 12th HSC Chemistry Coordination Compounds Previous Year Questions with Solutions — Maharashtra Board, HSC Class 12 (2025)
Posted by Agastya Classes • Updated for current exam trend • Practice PYQs to score higher in Chemistry Paper 2
Why Coordination Compounds are Important for HSC 12th Chemistry
Coordination Compounds (Chapter 09) are a high-yield topic in the Maharashtra Board HSC Class 12 Chemistry paper. Questions on hybridisation, geometry, isomerism and applications are repeatedly asked. Understand these concepts and practice previous year questions (PYQs) to ensure marks.
Quick Exam Trend (Maharashtra Board 2025)
- High frequency: Geometry & hybridisation questions.
- Often asked: Isomerism (linkage, ionisation, cis/trans), EAN calculations.
- Application-based: Cisplatin, EDTA and electroplating examples.
- Scoring tip: Draw clear orbital diagrams and label hybridisation — examiners reward accurate diagrams.
Complete List — Previous Year Questions (PYQs)
Use this list to practice and create a mock paper. These are the extracted board questions from past papers relevant to Chapter 09: Coordination Compounds.
- Write the name of isomerism in the following complexes:
[Cu(NH₃)₄][PtCl₄]and[Pt(NH₃)₄][CuCl₄] - Explain linkage isomerism in complexes with one example.
- On the basis of Valence Bond Theory, explain the nature of bonding in the following complex:
[CoF₆]³⁻ - Explain the geometry of
[Co(NH₃)₆]³⁺on the basis of hybridisation. (Z of Co = 27) - Explain the geometry of
[Cu(NH₃)₄]²⁺on the basis of hybridisation. (Z of Cu = 29) - Explain formation of
[CoF₆]³⁻complex with respect to:
i. Hybridisation
ii. Magnetic properties
iii. Inner / Outer complex
iv. Geometry - Write applications of coordination compounds in medicine and electroplating.
- Write the name of platinum complex used in the treatment of cancer.
Important Subtopics — Revise These
- Types of ligands: monodentate, bidentate, polydentate (EDTA, en)
- Isomerism: linkage, ionisation, coordination, geometrical (cis/trans)
- Effective Atomic Number (EAN) rule — calculations
- Valence Bond Theory (VBT) & Crystal Field Theory (CFT) basics
- Hybridisation and orbital diagrams (dsp2, sp3d2 etc.)
- Applications: cisplatin in cancer treatment, EDTA in chelation, electroplating examples
Study Strategy — 7-day quick plan
- Day 1: Read theory — ligands & isomerism. Make short notes.
- Day 2: Practice VBT & hybridisation problems, draw orbital diagrams.
- Day 3: Solve EAN and oxidation state problems.
- Day 4: Solve all past board questions on isomerism, linkage, ionisation.
- Day 5: Applications — learn key examples (cisplatin, EDTA, K[Ag(CN)₂], K[Au(CN)₂]).
- Day 6: Mock test — answer 3 long/detailed questions under timed condition.
- Day 7: Revision & formula sheet creation (hybridisation types, EAN formula).
Exam-Day Tips
- Draw clean orbital diagrams — label electron pairing & vacant orbitals.
- For hybridisation problems, state oxidation state and valence shell configuration first.
- For isomerism answers, include structural sketches (cis/trans, linkage examples).
- Write short, precise points for applications — name the compound and its use.
.png&description=12th HSC Chemistry Coordination Compounds Previous Year Questions){kind=link}