Question

When a bottle of cold drink is opened, the gas comes out with a fizz due to

• A. Decrease in pressure suddenly which results in decrease of solubility of $C{O}_2$ gas in water
• B. Decrease in temperature
• C. Increase in temperature
• D. None

Answer 1

The correct option is A Decrease in pressure suddenly which results in decrease of solubility of $C{O}_2$ gas in water

Dependence of solubility of gas on pressure

Solubility of a gas in liquid is directly proportional to the pressure of the gas above the liquid which is called Henry’s law.

$\text{Solubility}=K_H\times \text{Pressure}$

When a bottle of cold drink is opened, the pressure above the cold drink decreases suddenly, due to which the solubility of gas inside the drink decreases and some of the dissolved gas $C{O}_2$ escapes from the bottle and it comes out as a fizz.

Hence, option (C) is the correct answer.