Answer to Question #343729 in Chemistry for Aida

Question

A drop of liquid bromine is placed in the bottom of a gas jar.brown fumes of bromine vapour slowly spread through the covered jar.

Why does this happen?

A.bromine vapour is less dense than air

B.Bromine molecules and the molecules in the air are always moving around

C.Bromine molecules are smaller than the molecules in air

D.Bromine molecules move faster than the molecules in air

Which is the answer and explain all the options.