Q. A solution of urea is isotonic with a 0.1 M NaCl solution. The concentration of urea solution would be:

यूरिया का एक घोल 0.1 M NaCl घोल के साथ आइसोटोनिक होता है। यूरिया घोल की सांद्रता होगी:

0.1 M
0.1 एम

0.2 M
0.2 एम

0.3 M
0.3 एम

0.05 M
0.05 एम

NaCl dissociates into 2 ions → van't Hoff factor $i = 2$ .

For isotonic solutions:

C_{urea} \times 1 = C_{NaCl} \times 2

So, urea concentration = 0.2 M.

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