Advertisements
Advertisements
प्रश्न
A student placed a gas jar containing air in the upside down position over a gas jar full of red-brown bromine vapours. He observed that the red-brown colour spread upwards into the jar containing air. Based on this observation, the student concluded that it is only the bromine vapour which moves up and diffuses into air in the upper jar, the air from the upper jar does not move down by diffusion into the lower jar containing bromine vapours. Do you agree with this conclusion of the student? Give reason for your answer.
Advertisements
उत्तर
No, the conclusion made by the student is wrong because the air from the upper gas jar also diffuses down into the lower gas jar containing bromine vapour. Since, air is colourless it cannot be noticed by the student.
APPEARS IN
संबंधित प्रश्न
Tabulate the differences in the characteristics of states of matter.
Give reasons:
We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.
A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.
Fill in the following blank with suitable words :
Solid, liquid and gas are the three ........................ of matter.
Why do gases diffuse very fast?
Why does a gas exert pressure?
Why does a gas fill a vessel completely?
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 jars appear brown in colour. Which of the following conclusion obtained from these observations is incorrect?
Comment upon the following:-
density
Explain why?
- A gas fills a vessel completely?
- Camphor disappears without leaving any residue.
