Solutions

A soft drink was bottled with a partial pressure of CO? of 3 bar over the liquid at room temperature. The partial pressure of CO? over the solution approaches a value of 30bar when 44 g of CO? is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is * 10?¹ /
(First dissociation constant of H?CO? = 4.0 * 10?; log 2 = 0.3; density of the soft drink = 1 g mL?¹)

A set of solutions is prepared using 180 g of water as a solvent and 10 g of different non-volatile solutes A, B and C. The relative lowering of vapour pressure in the presence of these solutes are in the order [Given, molar mass of A = 100 g mol⁻¹; B = 200 g mol⁻¹; C = 10,000 g mol⁻¹ ]

The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is 0.20 atm. The osmotic pressure of a solution formed by mixing 1 L of the sodium chloride solution with 2 L of the glucose solution is x * 10⁻³ atm. x is (nearest integer)

A 100 mL solution was made by adding 1.43 g of Na₂CO₃ · xH₂O. The normality of the solution is 0.1 N. The value of x is (The atomic mass of Na is 23 g/mol )

The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following process can explain this?