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 gas jar. Why does this happen? A. Bromine vapour is less dense than air. B. Bromine molecules and the molecules in 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.

Answer 1

b

Explanation:

When a gas jar containing air is inverted over gas jar containing bromine vapour, both bromine and air molecules move and collide with one another and bounce back in all directions due to which we see a uniform red brown colour in both the jars.