NEET ChemistryNCERT Class 11Atomic Structure
Structure of Atom: NEET questions with solutions
NEET tests quantum-number rules, node counting, Bohr-model energies and spectral lines, photon and de Broglie arithmetic, the uncertainty principle and the half-filled/fully-filled exceptions in electronic configuration. Marks are lost on unit slips (nm to m, g to kg), forgetting Z² for hydrogen-like ions, and mixing radial with angular nodes.
Revise first: NCERT notes for Structure of AtomQuestions
10 questions · answers after you pick
1Which set of quantum numbers (n, l, mₗ, mₛ) is NOT possible for an electron in an atom?Quantum numbersEasySingle correct2Which pair of species are isobars?Isotopes and isobarsEasySingle correct3What is the energy of one photon of ultraviolet light of wavelength 300 nm? (h = 6.626 × 10⁻³⁴ J s, c = 3.0 × 10⁸ m s⁻¹)Planck's quantum theoryEasySingle correct4Using Eₙ = −2.18 × 10⁻¹⁸ (Z²/n²) J, what is the energy of the electron in the second Bohr orbit (n = 2) of He⁺?Bohr's model for hydrogen-like ionsMediumSingle correct5An electron in a hydrogen atom drops from n = 4 to n = 2. Taking the Rydberg constant as 109 677 cm⁻¹, what is the wavenumber of the line…Line spectrum of hydrogenMediumSingle correct6What is the de Broglie wavelength of an electron (mass 9.11 × 10⁻³¹ kg) moving at 2.0 × 10⁶ m s⁻¹? (h = 6.626 × 10⁻³⁴ J s)Dual behaviour of matterMediumSingle correct7Chromium breaks the simple aufbau filling order in its ground state. Judge the Assertion (A) and the Reason (R) below.Stability of half-filled and fully filled orbitalsMediumAssertion–Reason8Light of different frequencies and intensities falls on a clean metal surface. Which of the statements about the photoelectric effect are…Photoelectric effectMediumStatement based9Match each hydrogen-like orbital in List I with the number of radial and angular nodes it has in List II.Shapes of atomic orbitalsHardMatch the following10An electron is known to lie within a region of width 0.10 nm. What is the minimum uncertainty in its velocity? (h = 6.626 × 10⁻³⁴ J s, mₑ =…Heisenberg's uncertainty principleHardSingle correct
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