Which one of the following statements is not true?

When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:

When a gas jar containing colourless air is kept upside down over a gas jar full of brown-coloured bromine vapour, then after sometime, the brown colour of bromine vapour spreads into the upper gas jar making both the gas jars appear brown in colour. Which of the following conclusion obtained from these observations is incorrect?

Look at the diagram on the right side. Jar A contains are d-brown gas whereas Jar B contains a colourless gas. The two gas jars are separated by a glass plate placed between them

(a) What will happen when the glass plate between the two jars is pulled away?

(b) What name is given to the phenomenon which takes place?

(c) Name the brown gas which could be in jar A.

(d) Which is the colorless gas most likely to be present in jar B?

(e) Name one coloured solid and one colourless liquid which can show the same phenomenon.

Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?