Multiple choice

If sodium metal is heated on the flame, it will give

  1. golden yellow colour

  2. crimson red colour

  3. lilac colour

  4. violet color

  5. None of these
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A Correct answer
Explanation

This option is correct because alkali metals and their salts impart colour when introduced in non-luminous flame of bunsen burner. The outer most electron of the metal goes into excited state due to absorption of the heat (energy). When these electrons return in ground state, they emit energy in the of the radiations of visible range, produced by a golden yellow colour.

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