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Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
The band spectrum is caused by:
  • A
    Molecules.
  • B
    Atoms.
  • C
    Any substance in solid state.
  • D
    Any substance in liquid state.
✓

Answer

  1. Molecules.

Explanation:

The band spectrum is caused by molecules. The energy levels of molecules are so close to each other that they combine to form a band. The valence band and conduction band are two types of bands. Electron transition between these two bands forms band spectrum.

For example a spectrum of air. The bright bands are due to molecular oxygen (O2​), molecular nitrogen (N2​), and other molecules.

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