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Indian Navy SSR (Sailor) d- and f-Block Elements — practice questions

Explore 25 free d- and f-Block Elements questions in Indian Navy SSR (Sailor) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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d- and f-Block Elements questions and exercises with answers

Showing questions 1–25 of 25.

In Valence Bond Theory, an octahedral LOW-SPIN complex like [Co(NH3)6]³⁺ uses which hybridisation?Read the answer and worked solution →Match each scientist to their contributionRead the answer and worked solution →Ionic or covalent?Read the answer and worked solution →Complete the driver of bond formationRead the answer and worked solution →Single, double and triple bondsRead the answer and worked solution →True or false: Lewis structuresRead the answer and worked solution →Complete the definition of resonanceRead the answer and worked solution →Tap every bond parameter the chapter namesRead the answer and worked solution →True or false: ionic solidsRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →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 →Bonded pair or lone pair?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why resonance is neededRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: what bond parameters affectRead the answer and worked solution →Bond parameters in useRead the answer and worked solution →Which parameter answers this?Read the answer and worked solution →True or false: resonanceRead the answer and worked solution →Order the steps: draw a Lewis structureRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reason: structureRead the answer and worked solution →Flip and pair: parameter with what it measuresRead the answer and worked solution →

Worked practice questions

In Valence Bond Theory, an octahedral LOW-SPIN complex like [Co(NH3)6]³⁺ uses which hybridisation?

  1. sp³d² (outer orbital, high spin)
  2. dsp² (square planar)
  3. d²sp³ (inner orbital, low spin)
  4. sp³ (tetrahedral)
Show answer and solution

Correct answer: C. d²sp³ (inner orbital, low spin)

Low-spin octahedral = d²sp³ (uses 3d² + 4s + 4p³ orbitals; INNER ORBITAL complex). High-spin octahedral = sp³d² (uses 4s + 4p³ + 4d²; outer orbital). dsp² is square planar (Ni²⁺ in 4-coordinate).

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Match each scientist to their contribution

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Matching pairs
  1. Left
    Kossel
    Right
    electrostatic attraction between ions, giving electrovalency
  2. Left
    Lewis
    Right
    covalent bonding by sharing electron pairs
  3. Left
    Lewis dot symbols
    Right
    show the valence electrons of an atom
  4. Left
    Lewis dot structures
    Right
    show the bonding in a molecule
The chapter opens with these two accounts of bonding. Source: syllabus Chemistry, Ch 4 Chemical Bonding and Molecular Structure.

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Ionic or covalent?

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Items
  1. Item
    Electrostatic attraction between ions
    Category
    Ionic bonding
  2. Item
    Gives the concept of electrovalency
    Category
    Ionic bonding
  3. Item
    Forms a crystal lattice
    Category
    Ionic bonding
  4. Item
    Sharing of electron pairs
    Category
    Covalent bonding
  5. Item
    Described first by Lewis
    Category
    Covalent bonding
  6. Item
    Can be single, double or triple
    Category
    Covalent bonding
Categories
  1. Item
    Ionic bonding
  2. Item
    Covalent bonding
One transfers electrons and holds by electrostatic attraction the other shares them. Source: syllabus Chemistry, Ch 4 Chemical Bonding and Molecular Structure.

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