Equal volumes of glucose solution at 300 K and sucrose solution at 300 K are mixed without change in — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Both initial solutions are non-electrolytes with the same molarity ($M/20$) at the same temperature, so they have the same initial osmotic pressure: $\pi_1 = \pi_2$. Mixing equal volumes of $M/20$ solutions results in a final mixture with the same total molarity ($M/20$). Thus, its osmotic pressure remains unchanged: $\pi_3 = \pi_1 = \pi_2$. Therefore, correct answer is A.