Chemistry MCQ Practice

 

What would be observed for the water level at X after some time?

 

A)  fall and remain constant

 

B)  fall and rise back to X

 

C)  rise and fall back to X

 

D)  rise and remain constant

 

 

Answer: C

 

- In a porous pot qns, a gas diffuses into the pot while another gas diffuses out i.e. CO₂ diffuses in and Ne diffuses out.

 

- CO₂ has a larger M_r than Ne → Ne diffuses out faster than CO₂ diffuses in.

 

- After a short while, there will be lesser as particles inside the pot → pressure in the pot decrease → water level at X will rise

 

- When the concentration of Ne inside and outside the pot becomes equal, Ne will stop diffusing out while CO₂ will continue to diffuse in. So the pressure inside the pot will slowly increase and the water level will gradually fall back to X.