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Question

Which of the following halogen exists as a solid at room temperature?

A
Chlorine
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B
Fluorine
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C
Iodine
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D
Bromine
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Solution

The correct option is C Iodine
The strength of the van der Waals between molecules forces increases as the size of the halogen increases from fluorine to iodine. As a result, F2 and Cl2 are gases at room temperature, Br2 is a liquid whereas I2 is a solid.

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