Question

Which of the following solution is isotonic with 0.1 M sucrose solution at 25 degree centigrade.. 1) 0.1 M Nacl 2) 0.1 M CH3 COOH 3) 0.1 M NH2 CONH2 4) 0.1 M Ca(OH) 2

Answer 1

Option (3) 0.1 M NH2CONH2

That is UREA which is an organic compound and its van't Hoff Factor is 1.

And SUCROSE is also an organic compound so it's van't Hoff Factor is also 1..

Hope this helps you....

Answer 2

0.1 M NH$_2$CONH$_2$ will be isotonic to the 0.1 M sucrose solution at 25 degree centigrade .

• Isotonic solutions are the solutions which have the same osmatic pressure .

• At same temperature , the solution having the same concentration and van't hoff factor as sucrose solution will be isotonic to it .

• 0.1 M NH$_2$CONH$_2$ will be isotonic to the sucrose solution as the concentration is same and the van't hoff factor is same for the two solutions that is 1 .