NEET Physics: Atoms and Nuclei questions with solutions

Q1. The characteristic spectrum of an atom is observed as

1. Pure line spectrum
2. Emission band spectrum
3. Absorption line spectrummmmmm
4. Absorption band spectrum

Answer: Pure line spectrum

An atom has quantized electron energy levels, so transitions between them emit or absorb only specific wavelengths. That gives a pure line spectrum rather than a band spectrum, which is typical of molecules.