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NEET2002ChemistryStructure of AtomActual

Assertion : Absorption spectrum consists of some bright lines separated by dark spaces. Reason : Emission spectrum consists of dark lines.

Options

  1. AIf both the assertion and reason are true and reason is a correct explanation of the assertion.
  2. BIf both assertion and reason are true but assertion is not a correct explanation of the assertion.
  3. CIf the assertion is true but the reason is false.
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

Absorption spectrum is produced when white light is passed through a substance and transmitted light is analysed by a spectrograph. The dark spaces corresponds to the light radiation absorbed by the substance. And emission spectrum is produced by analysing the radiant energy emitted by an excited substance by a spectrograph. Thus, discontinuous spectra consisting of a series of sharp lines and separated by dark bands are obtained.

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