Top Strategies to Excel in JEE Main Coordination Compounds Mock Tests
Coordination Compounds is an indispensable chapter for JEE Main Chemistry, covering intricate concepts like coordination number, isomerism, nomenclature, bonding theories, and applications in analytical chemistry. Mastering this chapter boosts your confidence for high-weightage MCQs and helps build a strong foundation for both inorganic chemistry and competitive exam success. Challenge yourself with this targeted mock test to reinforce your concepts and accelerate your JEE 2025 preparation!
Mock Test Instructions for the Coordination Compounds Mock Test 1-2:
- 20 questions from Coordination Compounds Mock Test 1-2
- Time limit: 20 minutes
- Single correct answer per question
- Correct answers appear in bold green after submission
How Can JEE Mock Tests Help You Master Coordination Compounds?
- Find out how well you recall complex IUPAC nomenclature and formula writing for coordination compounds.
- Improve concept clarity on isomerism, ligand types, and bonding through diverse MCQs.
- Track your progress with instant feedback and learn from detailed answer keys for every solution.
- Practice time management and accuracy—key for scoring in high-weightage JEE Chemistry topics.
- Spot recurring mistakes in bonding theories and apply correction with each test re-attempt.
Boost Your JEE Chemistry Rank: Master Coordination Compounds with Expert-Designed Mock Tests
- Analyze PYQ patterns and difficulty for Coordination Compounds using realistic mock test simulation.
- Test understanding of isomerism (geometrical, optical, linkage) with exam-focused questions.
- Sharpen speed for calculations around oxidation state, hybridization and EAN in complex ions.
- Strengthen command on nomenclature and detection of ambidentate/chelating ligands via regular practice.
- Mock test reviews highlight your weak points, enabling pinpointed revision for JEE Main 2025.
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FAQs on Coordination Compounds Mock Test for JEE Main 2025-26 Preparation
1. What is a coordination compound?
Coordination compounds are chemical substances in which a central metal atom or ion is surrounded by a set of molecules or anions known as ligands, which are bound to it through a coordinate (dative covalent) bond. These compounds have a specific structure called a coordination sphere and exhibit unique properties different from the individual components.
2. Give examples of commonly known coordination compounds.
Some well-known coordination compound examples include:
• [Fe(CN)6]4– (hexacyanoferrate(II))
• [Cu(NH3)4]2+ (tetraamminecopper(II))
• [Co(NH3)6]3+ (hexaamminecobalt(III))
• K4[Fe(CN)6] (potassium ferrocyanide)
• [PtCl2(NH3)2] (cisplatin, used as an anti-cancer drug)
3. How do you write the formula of a coordination compound?
To write the formula of a coordination compound:
1. Place the coordination sphere (central metal and ligands) in square brackets.
2. List the ligands alphabetically (excluding counter ions), followed by the metal symbol.
3. The charge of the complex ion is written as a superscript outside the bracket.
4. Write the counter ion(s), if any, outside the brackets.
Example: For tetraamminechloridoplatinum(II) chloride, the formula is [Pt(NH3)4Cl]Cl2.
4. Is the topic coordination compounds easy to understand?
The topic coordination compounds can be made easy with consistent practice and understanding of key concepts such as nomenclature, structure, isomerism, and bonding. Using regular revision, flowcharts, and practicing previous years’ questions can help in mastering this chapter for JEE, NEET, MHT-CET, and other entrance exams.
5. What are ligands? Give examples.
Ligands are ions or molecules that surround a central metal atom/ion in a coordination compound, donating a lone pair of electrons to form a coordinate bond. Examples include NH3 (ammine), Cl– (chloro), CN– (cyano), and H2O (aqua).
6. How is the nomenclature of coordination compounds done?
The nomenclature of coordination compounds follows these rules:
• Name the ligands in alphabetical order before the metal.
• Use prefixes (di-, tri-, etc.) for identical ligands.
• Name the central metal with its oxidation state in Roman numerals inside parentheses.
• Anion ligands end with ‘o’ (e.g., chloro, cyano).
• Write counter ions (if any) at the end.
Example: [Co(NH3)6]Cl3 is called hexaamminecobalt(III) chloride.
7. What types of isomerism are shown by coordination compounds?
Coordination compounds exhibit various types of isomerism, including:
• Structural isomerism: Ionization, hydrate, linkage, and coordination isomerism
• Stereoisomerism: Geometrical (cis–trans) and optical isomerism
These isomers differ in arrangement of ligands or spatial orientation, leading to different properties.
8. What is the significance or application of coordination compounds?
Coordination compounds have important applications in:
• Biology: Hemoglobin and Vitamin B12 contain coordination complexes
• Medicine: Cisplatin is used as an anti-cancer drug
• Industrial: Used in extraction and purification of metals, and as catalysts (e.g., Wilkinson’s catalyst)
• Analytical Chemistry: Gravimetric and volumetric analysis uses complex formation.
9. How do you determine the oxidation number of the central metal in coordination compounds?
To find the oxidation number of the central metal:
• Assign usual charges to all ligands and counter ions
• Let the oxidation state of the metal be x
• Set up an equation: (sum of ligand charges + x = overall charge on the complex ion)
• Solve for x
Example: In [Fe(CN)6]3–, each cyanide is –1. If x + 6(–1) = –3, then x = +3.
10. What is meant by the chelate effect?
The chelate effect refers to the enhanced stability of coordination compounds where the ligand forms two or more coordinate bonds with the central metal. Polydentate ligands (like EDTA or ethylenediamine) form ring structures with the metal ion, leading to increased stability compared to similar complexes with only monodentate ligands.
11. What is the role of coordination compounds in biological systems?
Many coordination compounds are vital for life. For example, hemoglobin (coordination complex of Fe2+ and porphyrin), chlorophyll (coordination complex of Mg2+), and Vitamin B12 (contains cobalt) are crucial for oxygen transport, photosynthesis, and metabolism.
12. What is the difference between a double salt and a coordination compound?
A double salt is a crystalline salt containing two different salts, which dissociates completely in water into its constituent ions. A coordination compound retains its identity and does not dissociate into simple ions in solution; instead, it forms a complex ion with its ligands. Example: Mohr’s salt (double salt), [Fe(CN)6]4– (coordination compound).
