NCERT Class XII Chemistry
Chapter - The p-Block Elements
Questions with Solutions

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Question : 27
Total: 74
Why are halogens coloured?
Solution:  
All halogens are coloured because of absorption of radiations invisible region which results in the excitation of outer electrons to higherlevel. By absorbing different quanta of radiation, they display differentcolours as
F2 → yellow
Cl2 → greenish yellow
Br2→ red
I2 → violet
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