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

Options

A. low ionization energy of sodium
B. sublimation of metallic sodium to give yellow vapour
C. emission of excess energy absorbed as a radiation in the visible region
D. photosensitivity of sodium

Answer

C

Explanation

Sodium ions after absorbing heat energy from the bunsen flame emit exces energy in the form of yellow light in the visible region.