Question
Which among the given haloalkanes develop colour when exposed to light?
✓
Answer
- R−Br and R−I
As we progress down the periodic table from fluorine to iodine, molecular size increases. As a result, we also see an increase in bond length.
As the bond length increases, upon irradiation of light, after absorption the compound emit light in visible region. Hence, R-Br and R-I bond exhibit color when exposed to light.
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