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The freezing point depression constant K f of benzene is 5.12   K   kg   mol – 1 . The freezing point depression for the solution of molality 0.078   m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

Options

  1. A0.80   K
  2. B0.40   K
  3. C0.60   K
  4. D0.20   K

Correct answer

B. 0.40   K

Step-by-step solution

ΔT f = K f × m = 5 . 12 × 0 . 078 ΔT f = 0 . 40 K

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