Question

Soda drinks bubble when the bottle is opened because:

Answer 1

Answer:

(3) the partial pressure of carbon dioxide above the solution is reduced.

Explanation:

We know , Soda water contains pressured carbon dioxide pressured with cap because we know according to Henry's law partial pressure of the gas is directly proportional to pressure applied. Therefore, $CO_2$ is pressurized in the bottle.

But as we open the bottle the pressure decreases the excess $CO_2$ (and air) escapes producing effervescence and partial pressure of $CO_2$ decreases. ( Because of Henry's Law)  

Hence, it is the required solution.