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Structure of Atom

57 questions · Chemistry · NEET
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Structure of Atom

57 questions · Chemistry · NEET

  1. The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes n=2→n=3 and n=4→ n=6 transitions, respectively, is2025 · Q113 · MCQ
  2. Energy and radius of first Bohr orbit of He+and Li2+ are [Given RH​=2.18×10−18 J,a0​=52.9pm ]2025 · Q119 · MCQ
  3. The energy of an electron in the ground state (n=1) for He+ ion is −x J, then that for an electron in (n=2) state for Be3+ ion in J is2024 · Q118 · MCQ
  4. Match List I with List II. Choose the correct answer from the options given below : Includes table2024 · Q121 · MCQ
  5. The quantum numbers of four electrons are given below : I. n=4;I=2;m1​=−2;s=−21​ II. n=3;I=2;m1​=1;s=+21​ III. n=4;I=1;m1​=0;s=+21​ IV. n=3;I=1;m1​=−1;s=+21​ The…2024 · Q126 · MCQ
  6. Given below are two statements: Statement I: The Balmer spectral line for H atom with lowest energy is located at 365​RH​ cm−1. (RH​= Rydberg constant) Statement II: When the temperature of…2024 · Q135 · MCQ
  7. Given below are two statements: Statement I : The value of wave function, ψ depends upon the coordinates of the electron in the atom. Statement II : The probability of finding an electron at a point within an atom is proportional to…2023 · Q101 · MCQ
  8. Incorrect set of quantum numbers from the following is :2023 · Q88 · MCQ
  9. Select the correct Statements from the following : A. Atoms of all elements are composed of two fundamental particles. B. The mass of the electron is 9.10939×10−31 kg. C. All the isotopes of a given elements show…2023 · Q101 · MCQ
  10. The relation between nm​,(nm​= the number of permissible values of magnetic quantum number (m)) for a given value of azimuthal quantum number (l), is2023 · Q107 · MCQ
  11. When electromagnetic radiation of wavelength 300 nm falls on the surface of a metal, electrons are emitted with the kinetic energy of 1.68 × 105 J mol−1. What is the minimum energy needed to remove an electron from the metal? (h =…2022 · Q134 · MCQ
  12. Match List-I with List-II : Choose the correct answer from the options given below : Includes table2022 · Q96 · MCQ
  13. Identify the incorrect statement from the following.2022 · Q104 · MCQ
  14. If radius of second Bohr orbit of the He+ ion is 105.8 pm, what is the radius of third Bohr orbit of Li2+ ion?2022 · Q117 · MCQ
  15. From the following pairs of ions which one is not an iso-electronic pair?2021 · Q122 · MCQ
  16. A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light c = 3.0 × 108 ms−1]2021 · Q98 · MCQ
  17. 4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :2019 · Q100 · MCQ
  18. Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?2019 · Q101 · MCQ
  19. Which one is a wrong statement?2018 · Q100 · MCQ
  20. Which one is the wrong statement ?2017 · Q84 · MCQ
  21. Two electrons occupying the same orbital are distinguished by2016 · Q84 · MCQ
  22. How many electrons can fit in the orbital for which n = 3 and l = 1?2016 · Q100 · MCQ
  23. Which of the following pairs of d-orbitals will have electron density along the axes ?2016 · Q101 · MCQ
  24. Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z = 22)2015 · Q94 · MCQ
  25. The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following ?2015 · Q93 · MCQ
  26. The angular momentum of electron in 'd' orbital is equal to2015 · Q94 · MCQ
  27. What is the maximum number of orbitals that can be identified with the following quantum numbers ? n = 3, l = 1, m1 = 02014 · Q102 · MCQ
  28. Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 × 10−34 J s, speed of light, c = 3 × 108 m s−1)2014 · Q103 · MCQ
  29. Be2+ is isoelectronic with which of the following ions ?2014 · Q104 · MCQ
  30. The outer electronic configuration of Gd (At. No. 64) is2013 · Q103 · MCQ
  31. According to law of photochemical equivalence the energy absorbed (in ergs/mole) is given as (h = 6.62 × 10−27 ergs, c = 3 × 1010 cm s−1, NA = 6.02 × 10−23 mol−1)2013 · Q104 · MCQ
  32. What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ? n = 3, l = 1 and m = − 12013 · Q102 · MCQ
  33. Based on equation E = − 2.178 × 10−18 J (n2Z2​), certain conclusions are written. Which of them is not correct ?2013 · Q103 · MCQ
  34. The value of Planck's constant is 6.63 × 10−34 J s. The speed of light is 3 × 1017 mm s−1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 1015 s−1 ?2013 · Q104 · MCQ
  35. The orbital angular momentum of a p-electron is given as2012 · Q57 · MCQ
  36. The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is2012 · Q111 · MCQ
  37. Maximum number of electrons in a subshell with l = 3 and n = 4 is2012 · Q95 · MCQ
  38. According to the Bohr theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon ?2011 · Q58 · MCQ
  39. If n = 6, the correct sequence for filling of electrons will be2011 · Q108 · MCQ
  40. The total number of atomic orbitals in fourth energy level of an atom is2011 · Q86 · MCQ
  41. The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., λ1 and λ2 will be2011 · Q87 · MCQ
  42. A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be (h = 6.6 × 10−34 J s)2010 · Q74 · MCQ
  43. Maximum number of electrons in a subshell of an atom is determined by the following2009 · Q110 · MCQ
  44. Which of the following is not permissible arrangement of electrons in an atom ?2009 · Q111 · MCQ
  45. The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 × 10−18 g cm s−1. The uncertainty in electron velocity is (mass of an electron is 9 × 10−28 g)2008 · Q107 · MCQ
  46. If uncertainty in position and momentum are equal, then uncertainty in velocity is2008 · Q108 · MCQ
  47. Consider the following sets of quantum numbers : Which of the following sets of quantum number is not possible ? Includes table2007 · Q93 · MCQ
  48. The orientation of an atomic orbital is governed by2006 · Q109 · MCQ
  49. Given : The mass of electron is 9.11 × 10−31 kg, Planck constant is 6.626 × 10−34 J s, the uncertainty involved in the measurement of velocity within a distance of 0.1 A∘​ is2006 · Q110 · MCQ
  50. The energy of second Bohr orbit of the hydrogen atom is −328 kJ mol−1; hence the energy of fourth Bohr orbit would be2005 · Q84 · MCQ
  51. The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in hydrogen atom will be (Given ionization energy of H = 2.18 × 10−18 J atom−1 and h = 6.625 × 10−34 J s)2004 · Q100 · MCQ
  52. The velocity of Planck's constant is 6.63 × 10−34 J s. The velocity of light is 3.0 × 108 m s−1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 × 1015 s−1 ?2003 · Q110 · MCQ
  53. In hydrogen atom, energy of first excited state is − 3.4 eV. Then find out K.E. of same orbit of hydrogen atom2002 · Q88 · MCQ
  54. Main axis of a diatomic molecule is z, molecular orbital px and py overlap to from which of the following orbitals.2001 · Q109 · MCQ
  55. The following quantum numbers are possible for how many orbitals : n = 3, l = 2, m = +2 ?2001 · Q110 · MCQ
  56. For given energy, E = 3.03 × 10−19 Joules corresponding wavelength is (h = 6.626 × 10−34 J sec, c = 3 × 108 m/sec)2000 · Q106 · MCQ
  57. Isoelectronic species are2000 · Q107 · MCQ