The problem involves determining the correctness of statements related to osmotic pressure. Let's analyze each statement:
Statement (A): "Molar mass of a protein can be determined using the osmotic pressure method."
Osmotic pressure is used to determine the molar mass of large molecules like proteins. The relationship is given by the formula: Ο=CRT, where Ο is the osmotic pressure, C is the molarity, R is the ideal gas constant, and T is the temperature in Kelvin. By measuring osmotic pressure, one can determine the molar mass, making this statement correct.
Statement (B): "The osmotic pressure is proportional to the molarity."
According to the formula Ο=CRT, osmotic pressure is directly proportional to the molarity (C). This is a valid statement.
Statement (C): "Reverse osmosis occurs when a pressure larger than osmotic pressure is applied to the concentrated solution side."
Reverse osmosis is a process where pressure greater than osmotic pressure is applied to push the solvent from a region of higher concentration to lower concentration, against the natural osmotic direction. This statement accurately describes reverse osmosis.
Statement (D): "Edema occurs due to retention of water in tissue cells as a result of osmosis."
Edema involves the accumulation of fluids in tissues, often due to osmosis. Osmosis leads to water moving into the cells or interstitial spaces when there is an osmotic imbalance. This statement is correct.
Thus, all statements (A), (B), (C), and (D) are correct based on the principles of osmotic pressure.