Question

(a) A closed gas jar contains colourless nitric oxide.
When the lid is opened, it is observed that brown gas
is coming out. Explain the reason.​

Answer 1

Explanation:

When a gas jar containing colourless air is kept upside down over a gas jar full of brown coloured bromine vapour, then after some time, the brown colour of bromine vapour spreads into the upper gas jar making both the gas jar appears brown in colour.