Question

Halogens are coloured because –

• A. Their atoms have high electronegativity
• B. Their atoms absorb energy causing excitation of outer electrons to higher energy levels.
• C. Some wavelengths of visible light are absorbed by their molecules causing excitation of outer electrons to higher energy levels
• D. The interparticle forces between their molecules are very weak

Answer 1

Answer: (C)

Some wavelengths of visible light are absorbed by their molecules causing excitation of outer electrons to higher energy levels

Answer 2

Halogens are molecules