why does an experimental bottle in a lab is fitted with cork and not with rubber?

Asked by Pawan | 5th Sep, 2015, 06:26: PM

Expert Answer:

A cork is porous in nature whereas rubber is solid whole body.
 
This enables cork to form tiny air pockets in it preventing vacuum to be created between the bottle and surrounding.
 
If vacuum is created then pressure inside the bottle would be much larger than the pressure surrounding the neck of the bottle.
 
This can lead to expulsion of chemicals with great force. If rubber is fitted then this scenario may arise.
 
With cork this will not happen as air pressure does not let chemicals to be expelled at great speed.

Answered by Romal Bhansali | 6th Sep, 2015, 05:55: PM