ATOMIC PHYSICS CBSE MCQ

1. Which of the following is true. [MP PET 1993] Lyman series is a continuous spectrum Balmer series is a line spectrum in the ultraviolet Paschen series is a line spectrum in the infrared The spectral series formula can be derived from the Rutherford model of the hydrogen atom

2. Minimum energy required to takeout the only one electron from ground state of He+ is. [CPMT 2002] 13.6 eV 27.2 eV 54.4 eV 6.8 eV

3. The angular momentum of electron in nth orbit is given by. [Roorkee 1993] nh nh/2π h/2πn n²h/2π

4. In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is. [AIEEE 2002] - 13.6 eV - 6.8 eV - 27.2 eV None of these

5. Which of the following is in the increasing order for penetrating power. [IIT 1994; RPET ] α, β, γ γ, α, β β, α, γ γ, β, α