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Which electronic level would allow a H-atom to absorb a photon but not to emit a photon ?

$(a)\;3s\qquad(b)\;2p\qquad(c)\;1s\qquad(d)\;3d$

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Solution :
At ground state i.e at level 1, H-atom can absorb an photon but not emit an photon.
It can reach a higher level by absorbing photon but there is no lower , so it can not emit photon .
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