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Class XI Chemistry Atomic Structure 4
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Question 1
If uncertainty in the position of an electron is zero, the uncertainty in its momentum would be
Question 2
In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron travelling with a velocity of 7.0 megameters per second. The mass of an electron is 9.1 × 10–31 kg
Question 3
A near UV photon of 300nm is absorbed by a gas and then re-emitted as two photons. One photon is red with wavelength 760nm. Hence, wavelength of the second photon is
Question 4
What should be the maximum number of lines obtained in the spectrum, if total number of energy levels are four?
Question 5
The wavefunction of the atomic orbital of a H- like species is given as
Ψ=[1/4(2π)]Z1/2(2-Zr)e-Zr/2
The radius for nodal surface for He+ ion is
Ψ=[1/4(2π)]Z1/2(2-Zr)e-Zr/2
The radius for nodal surface for He+ ion is
Question 6
If the series limit of wavelength of Lyman series for the hydrogen atom is 912 Å,then the series limit of wavelength for Balmer series of hydrogen atom is
Question 7
If the angular momentum of an electron changes from 2h/π to h/π during a transition in a hydrogen atom, it results in formation of spectral lines in
Question 8
The ratio of difference in energy of electron between first and second Bohr’s orbit to that between second and third Bohr’s orbit is
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Apr 20JEE & BITSAT