Chemistry - Atomic Structure Question with Solution | TestHub

ChemistryAtomic StructureMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

Radiation corresponding to the transition $n = 4$ to $n = 2$ in hydrogen atoms falls on a certain metal (work function = $2.0 e V$ ). The maximum kinetic energy of the photoelectrons will be:

Options:

Answer:

Solution:

$E_{n} = - \frac{13.6}{n^{2}} e V$ ; $E_{2} = - \frac{13.6}{2^{2}}$ ; $E_{4} = - \frac{13.6}{4^{2}} e V / a t o m$

$Δ E = E_{4} - E_{2} = 2.55 e V$

Absorbed energy = work function of metal + KE

$2.55 = 2 + K . E .$

$K . E . = 0.55 e V$

Stream:NTA_ABHYASSubject:ChemistryTopic:Atomic StructureSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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