Q. Sodium chloride imparts a golden yellow colour to the Bunsen flame. This can be interpreted due to:

 1977  210 The s-Block Elements Report Error

Solution:

Sodium chloride imparts a yellow color to the Bunsen flame. This can be interpreted due to the emission of excess energy absorbed as a radiation in the visible region. When an alkali or akaline earth metal (or its salt) is introduced in the flame, the valence electrons of the metal absorbs energy and are excited to the higher energy level. When excited electrons return to their ground state, they release the absorbed energy as visible light