JEE Main 2020 Chemistry question

A soft drink was bottled with a partial pressure of of 3 bar over the liquid at room temperature. The partial pressure of over the solution approaches a value of 30 bar when 44 g of is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is (First dissociation constant of = ; log 2 = 0.3; density of the soft drink = 1 g )