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JEE Main The d- and f-Block Elements & Coordination Compounds — practice questions — page 2

Explore 82 free The d- and f-Block Elements & Coordination Compounds questions in JEE Main Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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The d- and f-Block Elements & Coordination Compounds questions and exercises with answers

Showing questions 31–60 of 82.

Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Order the steps: read a formula like K₄[Fe(CN)₆]Read the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Tap every statement true of a chelate complexRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: where coordination chemistry mattersRead the answer and worked solution →Inside the brackets or outside?Read the answer and worked solution →Spot the odd one outRead the answer and worked solution →Counting the coordination numberRead the answer and worked solution →True or false: coordination numberRead the answer and worked solution →True or false: the theories and their limitsRead the answer and worked solution →Highest oxidation states of transition metals are typically observed only in their:Read the answer and worked solution →Spot the odd one outRead the answer and worked solution →Sort each complex by its geometryRead the answer and worked solution →Match each term to its definitionRead the answer and worked solution →The spin-only magnetic moment of $\mathrm{Fe}^{3+}$ (ground state) is approximately:Read the answer and worked solution →In Crystal Field Theory, the 5 d-orbitals in an OCTAHEDRAL field split into:Read the answer and worked solution →In the spectrochemical series, which ligand is the STRONGEST field?Read the answer and worked solution →The drug CISPLATIN has the formula [Pt(NH3)2Cl2]. Its anti-cancer activity comes from the:Read the answer and worked solution →In Valence Bond Theory, an octahedral LOW-SPIN complex like [Co(NH3)6]³⁺ uses which hybridisation?Read the answer and worked solution →The unusual stability of EDTA-metal complexes is mainly due to the:Read the answer and worked solution →The coordination number 6 most commonly gives which geometry?Read the answer and worked solution →Among $\mathrm{Sc^{3+}}$, $\mathrm{Ti^{4+}}$, $\mathrm{V^{2+}}$ and $\mathrm{Zn^{2+}}$, which is **coloured** in aqueous solution?Read the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Complete the coordination sphere ruleRead the answer and worked solution →Tap every statement true of a chelate complexRead the answer and worked solution →Match each complex to its shapeRead the answer and worked solution →

Worked practice questions

Two are true, one is not

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Questions
  1. False statement
    Oxalate is a unidentate ligand
    Statements
    1. A unidentate ligand binds through one donor atom
    2. EDTA⁴⁻ is a hexadentate ligand
    3. Oxalate is a unidentate ligand
  2. False statement
    Coordination number equals the number of ligands
    Statements
    1. Coordination number equals the number of ligands
    2. Coordination number counts sigma bonds only
    3. Pi bonds are not counted
  3. False statement
    Counter ions are part of the coordination sphere
    Statements
    1. The coordination sphere sits inside square brackets
    2. Counter ions are part of the coordination sphere
    3. Counter ions are written outside the brackets
The false line always swaps two neighbouring definitions. Source: syllabus Chemistry Part I, Ch 5 Coordination Compounds.

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Three of these are wrong. Find the one that holds.

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Questions
  1. Question
    Three of these statements about coordination number are false.
    Choices
    1. Item
      It counts sigma bonds only
      Correct
      Yes
    2. Explanation
      A didentate ligand contributes two donor atoms.
      Item
      It counts the number of ligands
    3. Explanation
      syllabus excludes pi bonds explicitly.
      Item
      Pi bonds are included
    4. Explanation
      Those are different quantities entirely.
      Item
      It equals the oxidation number
  2. Question
    Three of these statements about ligands are false.
    Choices
    1. Item
      EDTA⁴⁻ is hexadentate
      Correct
      Yes
    2. Explanation
      It binds through two nitrogens.
      Item
      en is a unidentate ligand
    3. Explanation
      It has one donor atom, so unidentate.
      Item
      NH₃ is didentate
    4. Explanation
      They use either one, not both.
      Item
      Ambidentate ligands use both donors
Each trap confuses two definitions the chapter keeps carefully apart. Source: syllabus Chemistry Part I, Ch 5 Coordination Compounds.

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Order the steps: read a formula like K₄[Fe(CN)₆]

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Steps
  1. Identify what lies outside the square brackets as the counter ion
  2. Everything inside the brackets is the coordination sphere
  3. Within it, name the central metal atom or ion
  4. Count the donor atoms bonded to it for the coordination number
  5. Balance the charges to find the metal's oxidation number
Working from the outside in gets both the counter ion and the oxidation number right. Source: syllabus Chemistry Part I, Ch 5 Coordination Compounds.

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