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Paragraph: Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to-day life. One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator automobiles. A solution M is p

Options

  1. A380.4 ~K
  2. B376.2 ~K
  3. C375.5 ~K
  4. D354.7 ~K

Correct answer

B. 376.2 ~K

Step-by-step solution

_ H ₂ O =0.9 (solvent) _ C ₂ H ₅ OH =0.1 (solute) T_b=k_b m=0.52 1.0 1000 0.9 18 =3.2 ~K Boiling point, T_b=373+3.2=376.2 ~K

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