The Von’t Hoff factor for solution is 2.74. The degree of dissociation of salt is — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Barium nitrate dissociates into 3 ions ($\text{Ba}^{2+} + 2\text{NO}_3^-$), so $n = 3$. The relationship is $i = 1 + (n-1)\alpha \Rightarrow 2.74 = 1 + 2\alpha \Rightarrow 2\alpha = 1.74 \Rightarrow \alpha = 0.87$. Therefore, correct answer is B.