Solutions – NEET UG ChemistryPractice Questions & PYQs

Inside a sealed pressure cooker, confining the generated steam elevates the internal pressure, which alters the thermal equilibrium of the system. This increased pressure causes the boiling point to decrease, allowing water and heat to penetrate the beans much faster. Consequently, the food softens and cooks in a significantly shorter duration than in conventional open cooking vessels.

Obtaining fresh water from saline environments requires overcoming the natural osmotic pressure that drives solvent molecules toward high solute concentrations. Applying external pressure exceeding this osmotic threshold across a semipermeable membrane forces water molecules to flow in the reverse direction. This desalination technique effectively traps dissolved salts and impurities while producing clean, potable water.

Macromolecules like proteins and polymers form solutions with extremely low molar concentrations, making property changes like boiling point or freezing point elevations nearly undetectable. Osmotic pressure, however, generates a significantly larger and easily measurable magnitude even at very dilute concentrations. This high sensitivity makes it the most accurate colligative property for determining large molecular weights.