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Grade: 12
        
Which of the following will have highest freezing point
1) 1M urea
2) 1M Na2SO4
3) 1M NaCl
4) 1M Al2(SO4)3
one year ago

Answers : (3)

Arun
21571 Points
							

As molality is same for all ; Freezing point depends only on Molality of solute and Vant hoff factor ( if solution is same ).

So in this case molality is same therefor vant hoff factor is deciding factor

Vant hoff factor for -

Nacl - 2

Urea -1

Na2SO4 -3

Al2(SO4)3 – 5

 

Hence  option  4 will be the correct naswer.

one year ago
Sonam kumari
15 Points
							
Since question ask highest freezing point but vant hoff is greater then low freezing point so less the vant hoff factor hughest will be freezing point so correct option is 1
5 months ago
preet kaur
13 Points
							
the correct option would be urea as it has the least vont hoff factor =1
nacl has i=2
na2so4 has i=3
al2(so4)3 has i=5
as we know that i is inversely proportional to freezing point and vapour preesure so correct ans is urea
one month ago
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