मराठी

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 - Science

Advertisements
Advertisements

प्रश्न

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 :

पर्याय

  • air is heavier than bromine

  • both air and bromine have the same density

  • bromine is heavier than air

  • bromine cannot be heavier than air because it is going upwards against gravity

MCQ

उत्तर

Bromine is heavier than air

The process occurring here is diffusion and it is unaffected by the mass. Therefore, bromine being heavier, mixes with the colourless air.
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Matter in Our Surroundings - Very Short Answers [पृष्ठ २१]

APPEARS IN

लखमीर सिंह Chemistry [English] Class 9
पाठ 1 Matter in Our Surroundings
Very Short Answers | Q 63 | पृष्ठ २१

संबंधित प्रश्‍न

Give a reason for the following observation. 

Naphthalene balls disappear with time without leaving any solid.


Why do gases have neither a fixed shape nor a fixed volume?


Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?


Why does a gas exert pressure?


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.


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 ?

______ is not affected by gravity.


Comment upon the following:-

filling a gas container


Comment upon the following:-

density


Which of the following is TRUE about gaseous state?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×