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The concentration in g/L of a solution of cane sugar (Molecular weight = 342) which is isotonic with a solution containing 6 g of urea (Molecular weight = 60) per litre is

Options

  1. A3.42
  2. B34.2
  3. C5.7
  4. D19

Correct answer

B. 34.2

Step-by-step solution

The two solution should have same molar concentration for being isotonic. Molar concentration of cabe sugar = Molar concentration of urea = 6 6 0 = 0.1 mol/L concentration of cane sugar in g/L = molar concentration  ×  molecular weight =   0 .1   ×   342   =   34 .2

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