JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
A solution containing \(62\,g\) ethylene glycol in \(250\,g\) water is cooled to \(-10\,^oC. \) If \(K_f\) for water is \(1.86\,K\,kg\,mol^{-1},\) the amount of water(in \(g\) ) separated as ice is
- A \(48\)
- B \(32\)
- C \(64\)
- D \(16\)
Answer & Solution
Correct Answer
(C) \(64\)
Step-by-step Solution
Detailed explanation
Let moles of \(H_2O\) separated as ice \(=\,x\,gm\) \(\Delta {T_f}\, = \,\,i\,{K_f}m\) \(10\, = \,1\, \times \,1.86\,\frac{{\frac{{62}}{{62}}}}{{\frac{{250\, - \,x}}{{1000}}}}\) \(x\, = \,64\,gm\)
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