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AP EAMCET20224 Jul 2022Evening ShiftChemistrySolutionsActual

A solution containing 6 . 0 g of urea is isotonic with a solution containing 10 g of a non-electrolytic solute X . The molar mass of X in g mol - 1 is

Options

  1. A50 . 0
  2. B100
  3. C75 . 0
  4. D68 . 0

Correct answer

B. 100

Step-by-step solution

Two solutions having same osmotic pressure at a given temperature are called isotonic solutions. When such solutions are separated. π = CRT π = Osmotic pressure C=Concentration in molarity R=Universal gas constant T=Temperature As the solutions are isotonic π urea = π X C urea = C X W urea M urea × 1000 V urea = W X M X × 1000 V X 6 60 × 1000 V urea = 10 M X × 1000 V X M X = 100 g Hence, the molecular weight of the non-electrolytic solute X is 100 gmol -1

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