how do you prove that diffusion is not due to gravity?

Question

a colourless gas P is denser than air.
a coloured gas Q is less dense than air.

if a gas jar containing P is placed over a gas jar containing Q, and after some time, the colour was uniform throughout the 2 gas jars,

how do you prove that diffusion had occured and this mixing was not merely due to gravity?

Answer 1

Its quite simple!
Instead of placing the jar containing gas P over the jar containing gas Q;
place the open mouths of the Two jars side by side and seal the joint by a tape.
The same phenomenom of diffusion occurs again like before i.e. the whole mixture will have the same colour( as obtained before )

In this Case since the jars are placed side by side you donot have to consider the effects of gravity at all.
Thus you proved that diffusion had occured and this mixing was not merely due to gravity.

Answer 2

Put an upside-down gas jar of hydrogen on top of a gas-jar of air, and wait a few minutes.

Both will then pop in a flame equally loudly.

Hydrogen cannot move downwards due to gravity, because it's the lightest gas known.

Answer 3

Do the same experiment with the denser gas on the bottom, or flip the jars upside down and see if the colors separate.

Answer 4

u could try placing jar Q over jar P. the result would still be the same! :)

Answer 5

Prove me anything other then existance and I will declare you a nobel prize. And by prove I mean 100% no doubt heh.