A 5% solution of cane sugar (molar mass 342) is isotonic

Question:

A $5 \%$ solution of cane sugar (molar mass 342 ) is isotonic with $1 \%$ of a solution of an unknown solute. The molar mass of unknown solute in $\mathrm{g} / \mathrm{mol}$ is :-

 

  1. 136.2

  2.  171.2

  3.  68.4

  4.  34.2


Correct Option: , 3

Solution:

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