23 JEE Main 2025 Structure of Atom previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2025 previous-year questions from the Structure of Atom chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Structure of Atom chapter hub.
Given below are two statements : Statement (I) : It is impossible to specify simultaneously with arbitrary precision, b…
The calculated spin-only magnetic moments of K₃ [Fe(OH)₆ ] and K₄ [Fe(OH)₆ ] respectively are :
Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom? (A)1 ~s 2 p 3 ~d…
Given below are two statements : Statement (I) : A spectral line will be observed for a 2 px → 2 py transition. Stateme…
For hydrogen like species, which of the following graphs provides the most appropriate representation of E vs Z plot fo…
If a₀ is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength (λ) of the electron presen…
Which of the following statements are true? (A) The subsidiary quantum number l describes the shape of the orbital occu…
Correct statements for an element with atomic number 9 are A. There can be 5 electrons for which ms=+(1)/(2) and 4 elec…
The energy of an electron in first Bohr orbit of H -atom is -13.6 eV. The magnitude of energy value of electron in the…
The extra stability of half-filled subshell is due to (A) Symmetrical distribution of electrons (B) Smaller coulombic r…
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