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Periodic Properties

The colour of...

Question

The colour of iodine is:

A

violet

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B

green

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C

white

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D

brown

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Solution

The correct option is A violet
Iodine has atomic number 53 belonging to group 17. The name is from Greek meaning violet or purple due to the colour of elemental iodine vapour. It is a bluish-black solid with a metallic lustre sublimating into violet-pink gas and colour is due to absorption of visible light by an electronic transition between highest and lowest molecular orbitals.

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