Advertisements
Advertisements
Question
Give reasons:
A gas fills completely the vessel in which it is kept.
Advertisements
Solution
- The kinetic energy in a gas is maximum due to the low force of attraction between the particles in which it is kept.
- The gas particles are constantly travelling in all directions at different speeds.
- As a result, they have no definite volume and, hence, completely fill the vessel in which they are kept.
RELATED QUESTIONS
Which of the two diffuses faster : a liquid or a gas?
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.
What does the diffusion of gases tell us about their particles?
Explain how, the smell of food being cooked in the kitchen reaches us even from a considerable distance.
Explain why, diffusion occurs more quickly in a gas than in a liquid.
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 :
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
- What will happen when the glass plate between the two jars is pulled away?
- What name is given to the phenomenon which takes place?
- Name the brown gas which could be in jar A.
- Which is the colourless gas most likely to be present in jar B?
- Name one coloured solid and one colourless liquid which can show the same phenomenon.
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.
______ is not affected by gravity.
Comment upon the following:-
fluidity
