Bromine particles are almost twice as heavy as chlorine particles. Which gas will diffuse faster; bromine(vapour) or chorine? Explain your answer.

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?

Why is a liquid (the hydraulic fluid) used to operate the brakes in a car?

Explain why, a small volume of water in a kettle can fill a kitchen with steam.