Which has minimum osmotic pressure ?

Question

Which has minimum osmotic pressure ? (A) 200 mL of 2 M NaCl solution (B) 200 mL of 1 M glucose solution (C) 200 mL of 2 M urea solution (D) all have same

Tardigrade Admin · Accepted Answer

NaCl is an electrolyte which dissociates to give ions. Concentration of ions in a 2 M NaCl solution = 4M. Glucose and urea are non-electrolytes. Thus glucose has minimum concentration and hence minimum osmotic pressure

Q. Which has minimum osmotic pressure ?

200 mL of 2 M NaCl solution

200 mL of 1 M glucose solution

200 mL of 2 M urea solution

all have same

NaCl is an electrolyte which dissociates to give ions. Concentration of ions in a 2 M NaCl solution = 4M. Glucose and urea are non-electrolytes. Thus glucose has minimum concentration and hence minimum osmotic pressure