Calculate the relative lowering of vapour pressure if vapour pressure of pure solvent and vapour pressure of…

Calculate the relative lowering of vapour pressure if vapour pressure of pure solvent and vapour pressure of solution at $25^{\circ} \mathrm{C}$ are 32 and 30 mm Hg respectively.
  1. 0.0721
  2. 0.0552
  3. 0.0625
  4. 0.9375

Solution

Relative lowering of vapour pressure $=\frac{\mathrm{P}^0-\mathrm{P}}{\mathrm{P}^0}=\frac{32-30}{32}=0.0625 \mathrm{Hg}$

Asked in: MHT CET 2024 (16 May Shift 2)

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