AIIMS 2019 Physics Hydrogen Spectrum Assertion Reason Question
Assertion: Hydrogen atom consists of only one electron but its emission spectrum has many lines. Reason: Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option B is correct because both the assertion and reason are true: the hydrogen atom, having only one electron, indeed produces a complex emission spectrum with multiple series (Lyman, Balmer, Paschen, etc.) due to transitions between various energy levels. However, the reason is not a correct explanation of the assertion since the absorption spectrum of hydrogen includes not only the Lyman series but also other series corresponding to higher energy transitions. Option A is incorrect because the reason does not correctly explain the assertion, while options C and D are incorrect as both the assertion and reason are true.
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