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AP EAMCET20228 Jul 2022Evening ShiftChemistrySolutionsActual

The depression in freezing point of solution of molality 0.01 ~mol ~kg ⁻¹ is highest with respect to which of the solvent? (Whose K_f is given in brackets)

Options

  1. AWater (1.86)
  2. BBenzene (5.12)
  3. CCarbon tetrachloride (31.8)
  4. DCyclohexane (20.0)

Correct answer

C. Carbon tetrachloride (31.8)

Step-by-step solution

Given, molality of solution =0.01 ~mol ~kg ⁻¹ We know that, T_f=i K_f m ...(i) (where, symbols have their usual meaning) The van't Hoff factor for all given solvent is 1 as they does not ionise. Therefore, For, Eq (i) T_f K_f Therefore, the depression in freezing point of given solution is highest for carbon tetrachloride because its K_f value is highest.

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