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Structure of Atom

JEE Main 2024 (Online) 30th January Morning ShiftMCQEasy📈 Topic in 14% papers+4−1
Ques. 1JEE Main 2024, 30 January (Morning Shift)

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are false
  4. Both Statement I and Statement II are true

Answer

(1) Statement I is true but Statement II is false

Solution

Statement I: definition of degenerate orbitals ⇒ true

For H atom (one electron): En = - 13.6n2 eV depends on n only

⇒ 3s, 3p, 3d have the same energy ⇒ degenerate

∴ Statement II is false

Answer: (1)

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Ques. 2JEE Main 2024, 30 January (Evening Shift)

Number of spectral lines obtained in He+ spectra, when an electron makes transition from fifth excited state to first excited state will be

Ques. 3JEE Main 2024, 29 January (Morning Shift)

The correct set of four quantum numbers for the valence electron of rubidium atom (Z=37) is :

  1. 5, 1, 1, + 12
  2. 5, 0, 0, + 12
  3. 5, 0, 1, + 12
  4. 5, 1, 0, + 12
Ques. 4JEE Main 2024, 29 January (Evening Shift)

Match List I with List II Choose the correct answer from the options given below:

  1. A-II, B-IV, C-III, D-I
  2. A-I, B-III, C-II, D-IV
  3. A-II, B-III, C-I, D-IV
  4. A-I, B-II, C-III, D-IV
Ques. 5JEE Main 2024, 27 January (Morning Shift)

The number of electrons present in all the completely filled subshells having n = 4 and s = + 12 is . (Where n = principal quantum number and s = spin quantum number)

Ques. 6JEE Main 2024, 27 January (Evening Shift)

Total number of ions from the following with noble gas configuration is . Sr2+ (z = 38), Cs+ (z = 55), La2+ (z = 57), Pb2+ (z = 82), Yb2+ (z = 70) and Fe2+ (z = 26)

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