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MODEL PAPER 2025 — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsMODEL PAPER 20251 Mark
Question
Assertion (A): In a hydrogen atom there is only one electron but its emission spectrum shows many lines.
Reason(R): In a given sample of hydrogen there are many atoms each containing one electron; hence many electrons in different atoms may be in different orbits so many transitions from higher to lower orbits are possible.
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Answer

(A)

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