Start learning →

Indian Navy SSR Structure of Atom — practice questions

Explore 33 free Structure of Atom questions in Indian Navy SSR Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise Structure of Atom with Quill →

Structure of Atom questions and exercises with answers

Showing questions 1–30 of 33.

For Bohr's hydrogen-like atom, what is the velocity of electron in n-th orbit (in terms of fine structure constant α and c)?Read the answer and worked solution →In vacuum, the velocity of electromagnetic radiation isRead the answer and worked solution →The wave number of a photon of frequency $6 \times 10^{14}\,Hz$ (in vacuum) isRead the answer and worked solution →In the photoelectric effect, the *stopping potential* $V_0$ varies with the frequency of incident light asRead the answer and worked solution →The Bohr orbit velocity of the ground-state electron in hydrogen is aboutRead the answer and worked solution →As per your syllabus, what is the MOLECULAR MASS of methane (CH₄) — using C = 12.011 u and H = 1.008 u?Read the answer and worked solution →As per your syllabus, what is the energy of the first orbit of He⁺ (Z = 2, n = 1)?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 →

Worked practice questions

For Bohr's hydrogen-like atom, what is the velocity of electron in n-th orbit (in terms of fine structure constant α and c)?

  1. v_n = c / Z
  2. v_n = c α Z / n (where α ≈ 1/137)
  3. v_n = c
  4. v_n = c × n
Show answer and solution

Correct answer: B. v_n = c α Z / n (where α ≈ 1/137)

v_n = (1/n) × (Zα c) where α = e²/(4πε₀ ħc) ≈ 1/137 is the fine structure constant. **For H ground state:** v₁ ≈ c/137 ≈ 2.19 × 10⁶ m/s. Relativistic effects small for light atoms, but become significant for heavy atoms (high Z).

Open this question →

In vacuum, the velocity of electromagnetic radiation is

  1. $3 \times 10^{8}\,m\,s^{-1}$
  2. $3 \times 10^{5}\,m\,s^{-1}$
  3. $3 \times 10^{6}\,m\,s^{-1}$
  4. $3 \times 10^{10}\,m\,s^{-1}$
Show answer and solution

Correct answer: A. $3 \times 10^{8}\,m\,s^{-1}$

All EM radiation travels at $c = 3 \times 10^{8}\,m\,s^{-1}$ in vacuum, regardless of wavelength.

Open this question →

The wave number of a photon of frequency $6 \times 10^{14}\,Hz$ (in vacuum) is

  1. $5 \times 10^{-7}\,m^{-1}$
  2. $2 \times 10^{6}\,m^{-1}$
  3. $2 \times 10^{4}\,m^{-1}$
  4. $1.8 \times 10^{23}\,m^{-1}$
Show answer and solution

Correct answer: B. $2 \times 10^{6}\,m^{-1}$

$\bar{\nu} = \nu/c = (6 \times 10^{14})/(3 \times 10^{8}) = 2 \times 10^{6}\,m^{-1}$.

Open this question →

How to practise

  1. Choose a Structure of Atom 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

Organic ChemistryAlkenesAlcohols Phenols EthersPolymersChemical Equilibriump-Block ElementsThe p-Block ElementsAtoms and Molecules