19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The correct set of four quantum numbers for the valence electron of rubidium (Z = 37) is
In any subshell, the maximum number of electrons having the same value of spin quantum number is
A stream of electrons is passed between two charged plates at potential difference V (esu). If e and m are charge and mass of electron, the value of h/λ (λ = de Broglie wavelength) is
The frequency of light emitted for the transition n = 4 to n = 2 of He⁺ is equal to the transition in H atom corresponding to which of the following?
The emission spectra of He⁺ ions show 6 different photons. What will be the minimum wavelength during the transition? (R_H = Rydberg constant)
The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol⁻¹. The energy required to excite the electron from n = 1 to n = 2 is
If the total energy of an electron in the 1st shell of H atom = 0.0 eV (reference shifted), then its potential energy in the 1st excited state would be
Which of the following electronic transitions in a hydrogen atom will require the largest amount of energy?
The most probable radius (in pm) for finding the electron in He⁺ is
The velocity of an electron in the second shell of hydrogen atom is
Which series in the hydrogen spectrum lies in the ultraviolet region?
Which of the following statements does NOT form a part of Bohr's model of hydrogen atom?
For a Bohr atom, angular momentum of the electron is (n = 1, 2, 3 …)
The velocity of an electron in the second shell of hydrogen atom is
The most probable radius (in pm) for finding the electron in He⁺ is
Which of the following electronic transitions in a hydrogen atom will require the largest amount of energy?
If the total energy of an electron in the 1st shell of H atom = 0.0 eV (reference shifted), then its potential energy in the 1st excited state would be
Bohr's theory is NOT applicable to:
The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol⁻¹. The energy required to excite the electron from n = 1 to n = 2 is
The emission spectra of He⁺ ions show 6 different photons. What will be the minimum wavelength during the transition? (R_H = Rydberg constant)
The frequency of light emitted for the transition n = 4 to n = 2 of He⁺ is equal to the transition in H atom corresponding to which of the following?
A stream of electrons is passed between two charged plates at potential difference V (esu). If e and m are charge and mass of electron, the value of h/λ (λ = de Broglie wavelength) is
In any subshell, the maximum number of electrons having the same value of spin quantum number is
The correct set of four quantum numbers for the valence electron of rubidium (Z = 37) is
The number of unpaired d-electrons retained in Fe²⁺ ion (At. no. of Fe = 26) is