Start learning →

Indian Navy INET p-Block Elements — practice questions

Explore 32 free p-Block Elements questions in Indian Navy INET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise p-Block Elements with Quill →

p-Block Elements questions and exercises with answers

Showing questions 1–30 of 32.

The 'spin only' magnetic moment $\mu$ (in Bohr magnetons) of a transition metal ion with $n$ unpaired d-electrons is given by:Read the answer and worked solution →The spin-only magnetic moment of $\mathrm{Fe}^{3+}$ (ground state) is approximately:Read the answer and worked solution →JEEMAIN · Chemistry · Spot the Error — Chemistry BasicsRead the answer and worked solution →How does metallic character change down a group?Read the answer and worked solution →Which one of the following elements exhibit maximum number of valence electrons?Read the answer and worked solution →Which of the following elements would lose an electron easily?Read the answer and worked solution →Order the atomic models as they were proposedRead the answer and worked solution →Match each scientist to their modelRead the answer and worked solution →Match each model to what it could NOT explainRead the answer and worked solution →True or false: Rutherford's modelRead the answer and worked solution →True or false: Bohr's modelRead the answer and worked solution →Complete the reason Bohr's model failsRead the answer and worked solution →Which model does this belong to?Read the answer and worked solution →Match each quantum number to what it is calledRead the answer and worked solution →True or false: the quantum mechanical modelRead the answer and worked solution →Order the structure: from atom down to electronRead the answer and worked solution →Complete the (n + l) ruleRead the answer and worked solution →True or false: orbital energiesRead the answer and worked solution →Match each rule to what it forbids or requiresRead the answer and worked solution →Tap every statement Hund's rule requiresRead the answer and worked solution →The fundamental particlesRead 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 →Which principle is being described?Read the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every statement true of the Schrodinger modelRead the answer and worked solution →Reading the models backRead the answer and worked solution →Assertion and reason: filling orbitalsRead the answer and worked solution →

Worked practice questions

The 'spin only' magnetic moment $\mu$ (in Bohr magnetons) of a transition metal ion with $n$ unpaired d-electrons is given by:

  1. $\mu = n$
  2. $\mu = \sqrt{n}$
  3. $\mu = \sqrt{n(n+2)}$
  4. $\mu = n(n+1)$
Show answer and solution

Correct answer: C. $\mu = \sqrt{n(n+2)}$

The spin-only formula is $\mu = \sqrt{n(n + 2)}\,\text{BM}$, where $n$ is the number of unpaired electrons. It comes from the spin angular momentum quantum number $S = n/2$ and the relation $\mu = 2\sqrt{S(S+1)}\,\text{BM} = \sqrt{n(n+2)}$. The actual magnetic moment can differ slightly due to orbital contribution this is small for first-row transition ions in octahedral fields.

Open this question →

The spin-only magnetic moment of $\mathrm{Fe}^{3+}$ (ground state) is approximately:

  1. $1.73\,\text{BM}$
  2. $2.83\,\text{BM}$
  3. $4.90\,\text{BM}$
  4. $5.92\,\text{BM}$
Show answer and solution

Correct answer: D. $5.92\,\text{BM}$

$\mathrm{Fe}^{3+}: [\mathrm{Ar}]3d^5$, so $n = 5$ unpaired electrons (high-spin, weak-field assumption). $\mu = \sqrt{5 \times 7} = \sqrt{35} \approx 5.92\,\text{BM}$. The other options correspond to $n = 1, 2$ and $4$ unpaired electrons.

Open this question →

JEEMAIN · Chemistry · Spot the Error — Chemistry Basics

Read exercise and reference answers
Questions
  1. Statement parts
    1. The
    2. atomic
    3. number
    4. equals
    5. the
    6. number
    7. of
    8. neutrons
    9. .
    Correction
    protons
    Incorrect part
    neutrons
  2. Statement parts
    1. Isotopes
    2. have
    3. the
    4. same
    5. mass
    6. number
    7. but
    8. different
    9. atomic
    10. numbers
    11. .
    Correction
    atomic
    Incorrect part
    mass
  3. Statement parts
    1. Electrons
    2. occupy
    3. orbitals
    4. starting
    5. from
    6. the
    7. highest
    8. energy
    9. level
    10. .
    Correction
    lowest
    Incorrect part
    highest
  4. Statement parts
    1. The
    2. s
    3. orbital
    4. can
    5. hold
    6. up
    7. to
    8. six
    9. electrons
    10. .
    Correction
    two
    Incorrect part
    six
Instructions
Tap the incorrect word in each statement.

Open this exercise →

How to practise

  1. Choose a p-Block Elements question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Chemistry topics

JEE Main 2023 MixedAtomic combinationsStructure of AtomAtoms and ElementsChemical EquilibriumClass9 Atom StructureChemistryAlkenes