A good confirmatory test for free halogen is: Select one: a. their volatility b. their odor c. their color in water solution d. their color in a non-polar solvent

d. their color in a non-polar solvent

Explanation:

In non polar solvent such as cyclo hexane, halogens does not dilute, it rather maintains it's same or similar colour as it was in its concentrated form.

Halogens have 7 electrons in their outmost shells, examples includes chlorine, bromine, Iodine, astatine etc. They exist as room temperature.

Bromine exists as liquid.

Iodine as solid.

Chlorine as gas.