Question

Name a brown liquid which changes to brown vapours.

Answer 1

Bromine ($B{r}_2$) is a brown colour liquid which changes into brown colour vapour on heating.

Evaporation

1. When a liquid changes into vapour upon heating then this process is known as evaporation.
2. Bromine belongs to halogen family and it is brown colour liquid which on heating changes to brown colour gas.

${\mathrm{Br}}_2\left(\mathrm{l}\right)\stackrel{∆}{\to }$${\mathrm{Br}}_2\left(\mathrm{g}\right)$

Final Answer:

Bromine ($B{r}_2$)