Question

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

1. What will happen when the glass plate between the two jars is pulled away?
2. What name is given to the phenomenon which takes place?
3. Name the brown gas which could be in jar A.
4. Which is the colourless gas most likely to be present in jar B?
5. Name one coloured solid and one colourless liquid which can show the same phenomenon.

Answer 1

1. When the glass plate between the two jars is pulled away then the red brown gas will diffuse from jar A into colourless jar B and vice versa, due to which the red brown colour will spread into jar B.
2. The phenomenon occurring here is diffusion.
3. Bromine vapour.
4. Air.
5. Potassium permanganate (coloured solid) and water (colourless liquid) also show the same phenomenon.