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Question

Freezing point of a solution of non-volatile solute with benzene is 3°C. If the normal freezing point of benzene is 5.5°C. What is the expected normal boiling point of the solution? [Use Kb and Kf of benzene as 2.52 K kg mol–1 and 5.12 K kg mol–1 respectively; normal boiling point of benzene is 80.1°C]

बेन्जीन में अ-वाष्पशील विलेय के एक विलयन का हिमांक 3°C है। यदि बेन्जीन का सामान्य हिमांक 5.5°C है, तो विलयन का अपेक्षित सामान्य क्वथनांक क्या है? [बेन्जीन के Kb तथा Kf क्रमशः 2.52 K kg mol–1 तथा 5.12 K kg mol–1 प्रयुक्त करें; बेन्जीन का सामान्य क्वथनांक 80.1°C है]

A
83.0ºC
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B
82.5ºC
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C
85.5ºC
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D
81.33ºC
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Solution

The correct option is D 81.33ºC
Solution

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