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NEET2023ChemistrySome Basic Concepts of ChemistryActual

The density of 1 M solution of a compound ' X ' is 1.25 ~g ~mL ⁻¹ . The correct option for the molality of solution is (Molar mass of compound X=85 ~g )

Options

  1. A1.165 ~m
  2. B0.858 ~m
  3. C0.705 ~m
  4. D1.208 ~m

Correct answer

B. 0.858 ~m

Step-by-step solution

Relation between Molality ( m ), Molarity (M) and density (d) is m= 1000 M 1000 d-M M_ solute Msolute denotes molar mass of solute. m= 1000 1 (1000 1.25)-(1 85) = 1000 1250-85 = 1000 1165 m =0.858 ~m

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