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Structure of Atom

JEE Main 2026 (Online) 6th April Morning ShiftMatchingEasy📈 Topic in 5% papers+4−1
Ques. 1JEE Main 2026, 6 April (Morning Shift)

Match the LIST-I with LIST-II

  1. A-IV, B-I, C-III, D-II
  2. A-IV, B-II, C-III, D-I
  3. A-III, B-I, C-IV, D-II
  4. A-IV, B-III, C-II, D-I

Answer

(4) A-IV, B-III, C-II, D-I

Solution

Radial nodes = n − l − 1; nodal planes (angular nodes) = l

A. 2s: n = 2, l = 0 ⇒ radial nodes = 2 − 0 − 1 = 1, nodal planes = 0 ⇒ IV

B. 3s: n = 3, l = 0 ⇒ radial nodes = 3 − 0 − 1 = 2, nodal planes = 0 ⇒ III

C. 3p: n = 3, l = 1 ⇒ radial nodes = 3 − 1 − 1 = 1, nodal planes = 1 ⇒ II

D. 4d: n = 4, l = 2 ⇒ radial nodes = 4 − 2 − 1 = 1, nodal planes = 2 ⇒ I

∴ A-IV, B-III, C-II, D-I

Answer: (4)

Keep practising — Structure of Atom

Ques. 2JEE Main 2026, 6 April (Evening Shift)

The Bohr radius of a hydrogen like species is 70.53 pm. The species and the stationary state (n) are respectively (Given : Hydrogen atom Bohr radius is 52.9 pm)

  1. Li2+, 3
  2. He+, 3
  3. He+, 2
  4. Li2+, 2
Ques. 3JEE Main 2026, 5 April (Morning Shift)

Arrange the following atomic orbitals of multi electron atoms in order of increasing energy. Choose the correct answer from the options given below:

  1. C < D < B < A < E
  2. B < A < E < C < D
  3. E < C < D < B < A
  4. E < B < A < D < C
Ques. 4JEE Main 2026, 5 April (Morning Shift)

Identify the correct statements from the following : Choose the correct answer from the options given below:

  1. A, B and C Only
  2. A, B and D Only
  3. B, C and D Only
  4. A, C and D Only
Ques. 5JEE Main 2026, 5 April (Evening Shift)

Which of the following statement(s) is/are true ? Choose the correct answer from the options given below :

  1. A, B and C only
  2. A and C only
  3. C and D only
  4. A only
Ques. 6JEE Main 2026, 4 April (Morning Shift)

What is the ratio of wave number of first line (lowest energy line) of Balmer series of H atomic spectrum to first line of its Brackett series?

  1. 5 : 1
  2. 5 : 0.81
  3. 5 : 1.75
  4. 5 : 27
Ques. 7JEE Main 2026, 4 April (Morning Shift)

Which of the following is correct set of 4 quantum numbers of 19th electron in Chromium (Atomic number = 24) in accordance with Aufbau principle?

  1. n = 3, l = 2, m = +2, s = + 12
  2. n = 3, l = 2, m = -2, s = + 12
  3. n = 4, l = 1, m = 0, s = + 12
  4. n = 4, l = 0, m = 0, s = + 12
Ques. 8JEE Main 2026, 4 April (Evening Shift)

The species having identical radii according to the Bohr's theory are : Choose the correct answer from the options given below :

  1. A and C Only
  2. A and E Only
  3. B and E Only
  4. C and D Only
Ques. 9JEE Main 2026, 2 April (Morning Shift)

What is the energy (in J atom-1) required for the following process ? Li2+(g) Li3+(g) + e- (Take the ionization energy for the H atom in the ground state as 2.18 10-18 J atom-1)

  1. 8.72 10-18
  2. 1.962 10-18
  3. 1.962 10-17
  4. 6.54 10-17
Ques. 10JEE Main 2026, 2 April (Evening Shift)

The surface of sodium metal is irradiated with radiation of wavelength x nm. The kinetic energy of ejected electrons is 2.8 10-20 J. The work function of sodium is 2.3 eV. The value of x is 102 nm. (Nearest integer) (Given : h = 6.6 10-34 J s; 1 eV = 1.6 10-19 J; c = 3.0 108 m s-1)

Ques. 11JEE Main 2026, 28 January (Morning Shift)

The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series. (R = Rydberg constant)

  1. 5R36, 3R16, 21R100
  2. 7R144, 3R16, 16R255
  3. 3R4, 3R16, 7R144
  4. 5R36, 8R9, 15R16

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