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A solution of acetone in ethanol :

  1. A
    shows a negative deviation from Raoult's law
  2. B
    shows a positive deviation from Raoult's law
  3. C
    behaves like a near ideal solution
  4. D
    obeys Raoult's law

Solution & Step-by-step Explanation

Ethanol molecules are strongly bound to each other by hydrogen bonding. Upon the addition of acetone, the acetone molecules slide between ethanol molecules and break some of the hydrogen bonds. Since the new solute-solvent attractive forces are weaker than the pure solvent-solvent forces, the escaping tendency of the molecules increases, causing a positive deviation from Raoult's Law.

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

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