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JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties

\(600 \,g\) पानी \((\rho=1.00 \,g / mL )\) में \(NaCl\) की कितनी मात्रा मिलायी जाय कि उसका हिमांक घटकर \(-0.2^{\circ} C\) जो जाय ? ............. (पानी के लिए हिमांक अवनमन स्थिरांक \(=2 \,K kg \textrm {mol } ^ { - 1 } )\)

  1. A \(2.25\)
  2. B \(2\)
  3. C \(1.75\)
  4. D \(1.5\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(1.75\)

Step-by-step Solution

Detailed explanation

\(\Delta \mathrm{T}_{\mathrm{f}}=\mathrm{i} \times \mathrm{m} \times \mathrm{K}_{\mathrm{f}}\) \(0.2=2 \times 2 \times \frac{\mathrm{w} / 58.5}{600 / 1000}\) \(\mathrm{w}=1.755 \mathrm{gm}\)
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