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Why Does a Gas Fill a Vessel Completely? - Science

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प्रश्न

Why does a gas fill a vessel completely?

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उत्तर

Gases are easily compressible as they have large inter-molecular spaces. The gas particles can come closer to each other when external pressure is applied on gases.
On the other hand, it is almost impossible to compress a liquid because the intermolecular spaces in liquids are small. The particles in a solid are very close to each other. So, they cannot be compressed by applying external pressure.

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पाठ 1: Matter in Our Surroundings - Very Short Answers [पृष्ठ २०]

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लखमीर सिंह Chemistry [English] Class 9
पाठ 1 Matter in Our Surroundings
Very Short Answers | Q 52.3 | पृष्ठ २०

संबंधित प्रश्‍न

State whether the following statement is true or false :

Red-brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.


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 :

At room temperature, the forces of attraction between the particles of solid substances are ....................... then those which exist in the gaseous state.


A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother's room. Explain how the smell could have reached her brother's room.


Give reason for the following observation :

The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.


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.


The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.

  1. Name the substances (i) X (ii) Y and (iii) Z.
  2.  What is the process of conversion of X into Y known as ?
  3. At which temperature X gets converted into Y ?
  4. What is the process of conversion of X into Z known as ?
  5. At which temperature X gets converted into Z ?

Comment upon the following:-

density


2 litre He gas at 2 atm and 300 K is inserted into a 4 litre rigid container containing N2 at 600 K and 4 atm. Finally mixture is maintained at 600 K temperature. The final pressure of gaseous mixture would be ______ torr.


Two gases A and B having molecular weights 60 and 45 respectively are enclosed in a vessel. The wt. of A is 0.50 g and that of B is 0.2 g. The total pressure of the mixture is 750 mm. The partial pressure of the gases B is ______ mm Hg.


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