Test: Bohr's Model for Hydrogen Atom - NEET MCQ

What is the maximum number of emission lines obtained when the excited electron of a H atom in n = 5 drops to the ground state?

What is the colour corresponding to the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from n = 4 to n = 2?

_____series of lines are the only lines in hydrogen spectrum which appear in the visible region.

An electron in excited hydrogen atom falls from fifth energy level to second energy level. In which of the following regions, the spectrum line will be observed and is part of which series of the atomic, spectrum?

The third line of the Balmer series in the emission spectrum of the hydrogen atom is due to the transition from the

The angular momentum of an electron in a given stationary state can be expressed as . 
Based on this expression an electron can move only in those orbits for which its angular momentum is?

According to Bohr’s theory, the angular momentum of an electron in 5th orbit is

The radius of the stationary state which is also called Bohr radius is given by the expression r_n = n²a₀ where the value of a₀ is

If the radius of first Bohr orbit is x pm, then the radius of the third orbit would be

What does the negative electronic energy (negative sign for all values of energy) for hydrogen atom means?

If the ionisation energy of hydrogen atom is 13.6 eV, the energy required to excite it from ground state to the next higher state is approximately

Bohr’s theory can also be applied to the ions like

According to Bohr’s theory, the electronic energy of H-atom in Bohr’s orbit is given by

Which of the following is not correctly matched? 

What is the trend of energy of Bohr’s orbits?

The radius of hydrogen atom in ground state is 0.53 Å. What will be the radius of ₃Li²⁺ in the ground state?

What is the velocity of electron present in first Bohr orbit of hydrogen atom?