MCQ
A solution of acetone in ethanol
  • A
    obeys Raoult's law
  • B
    shows a negative deviation from Raoult's law
  • shows a positive deviation from Raoult's law
  • D
    behaves like a near ideal solution.

Answer

Correct option: C.
shows a positive deviation from Raoult's law
c
A solution of acetone in ethanol shows a positive deviation from Raoults' law due to miscibility of these two liquids with difference of polarity and length of hydrocarbon chain.

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$\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,HOC{H_2}} \\ 
  \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,| 
\end{array}} \\ 
  {{H_2}C = CH - C{H_2} - C{H_2} - C - OH} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2} - C{H_3}} 
\end{array}$ $\xrightarrow[{TsOH}]{{\begin{array}{*{20}{c}}
  O \\ 
  {||} \\ 
  {C{H_3} - C - C{H_3}} 
\end{array}}}(A)$ $\xrightarrow[{{{(C{H_3})}_2}S}]{{{O_3}}}(B) + HCHO$ Product $(B)$ is