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

Explore 27 free The 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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The d- and f-Block Elements questions and exercises with answers

Showing questions 1–27 of 27.

The modern periodic law states that the physical and chemical properties of elements are periodic functions of:Read the answer and worked solution →As per your syllabus, in IUPAC systematic nomenclature for Z > 100, what are the digit roots for 1, 2 and 0 respectively?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 →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

The modern periodic law states that the physical and chemical properties of elements are periodic functions of:

  1. Atomic mass
  2. Atomic radius
  3. Atomic number
  4. Number of neutrons
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Correct answer: C. Atomic number

Modern (Moseley's) periodic law: properties of elements are periodic functions of their **atomic number** ($Z$). This replaced Mendeleev's original law which was based on atomic mass. Why atomic number wins: it explains chemistry better (electronic structure follows $Z$, not mass) and resolves Mendeleev's anomalies (the Ar/K and Te/I pairs whose mass-order disagrees with chemistry-order).

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As per your syllabus, in IUPAC systematic nomenclature for Z > 100, what are the digit roots for 1, 2 and 0 respectively?

  1. un (u), bi (b), nil (n)
  2. mono (m), di (d), null (nl)
  3. ek (e), do (d), shun (s)
  4. one (o), two (t), zero (z)
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Correct answer: A. un (u), bi (b), nil (n)

As per your syllabus, 0=nil(n), 1=un(u), 2=bi(b), …, 9=enn(e). Suffix '-ium' added.

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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)
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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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More Chemistry topics

Chemical EquilibriumOrganic ChemistryThe p-Block ElementsAlcohols Phenols EthersAtoms and MoleculesClassification of Elementsp-Block ElementsPolymers