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JEE 2021: Structure of Atom
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Question 1
Electromagnetic radiation (photon) with highest wavelength result when an electron in the hydrogen atom falls from n=5 to
Question 2
What would be the value of wavenumber of emitted radiations with respect to R, when electron in hydrogen atom jumps from M orbit to K orbit?
Question 3
The difference in angular momentum associated with the electron in two successive orbits of hydrogen is
Question 4
If atomic radius is of the order of 10–8 cm and nuclear radius is of the order of 10–13 cm. The fraction of atom occupied by nucleus is
Question 5
If a0 is the radius of first Bohr orbit of H – atom and 6pa0 is the de-Broglie wavelength of nth orbit of hydrogen atom. Then value of n is:
Question 6
The eyes of certain members of reptile family pass a visual signal to the brain when the visual receptors are struck by photons of wavelength 890 nm. If a total energy of 3.15×10−14J is required to trip signal, what is the minimum number of photons that must strike the receptor?
Question 7
When photons of energy 4.25 eV strike the surface of a metal A. The ejected photoelectrons have maximum kinetic energy (TA. (expressed in eV) and de-Broglie wavelength (λA.. The max kinetic energy of photoelectrons liberated from another Metal B by photons of enegy 4.2 eV is TB. Where TB= (TA-1.5). If De-Broglie wave length of these photoelectrons λB (λB =2λA), then which of the following is not correct
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Feb 10JEE & BITSAT