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JEE Main Chemistry question

ChemistryStructure of AtomJEE Main

A species which complies with Bohr atomic model, absorbs a particular number of photons (having equal energy) in its ground state. It emits exactly the same number of photons of equal energy on its de-excitation. The possible combined energy of all these photons are mentioned below. How many of the below mentioned values of energies for this species is possible?

Answer: 3

Solution

Emitting the same number of photons (of equal energy) during de-excitation as were absorbed during excitation is possible only for a single-step excitation () followed by a single-step de-excitation (), i.e. exactly 1 absorbed photon and 1 emitted photon of the same energy — so the listed value

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Question ID VK-133019