AP EAMCET · Chemistry · Solutions
The freezing point depression of a solution containing \(0.6 \mathrm{~g}\) of urea (molar mass \(=60 \mathrm{~g} \mathrm{~mol}^{-1}\) ) in \(100 \mathrm{~mL}\) of benzene (in \(\mathrm{K}\) ) is \(\left(K_f\right.\) of \(\mathrm{CH}_3 \mathrm{COOH}=4.0 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\) )
- A 0.3
- B 0.58
- C 0.4
- D 0.24
Answer & Solution
Correct Answer
(C) 0.4
Step-by-step Solution
Detailed explanation
Given, Mass of urea \(=0.6 \mathrm{~g}\) Molar mass of urea \(=60 \mathrm{~g} \mathrm{~mol}^{-1}\) \(K_f\) of benzene \(=4.0 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\) and \(100 \mathrm{~mL}\) benzene \(=0.1 \mathrm{~L} \approx 0 . \mathrm{kg}\) \[ \Delta T_f=K_f m \] So,…
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