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State whether the following is true or false.
The partial molar volume of a component can be negative.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: B

Adding magnesium sulphate to water contracts the solution, so its partial molar volume is negative even though the salt itself occupies space. Partial molar quantities describe the response of the mixture, not the size of the molecule.

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