1.

At a certain temperature, the value of the slope of the plot of osmotic pressure (pi) against concentration ("C in mol L"^(-1)) of a certain polymer solution is 291R. The temperature at which osmotic pressure is measured is (R is gas constant)

Answer»

`271^(@)C`
`18^(@)C`
564 K
18 K

Solution :`pi=CRT`. Thus, a plot of `pi` vs C will be LINEAR with slope =RT. Hence,
RT = 291 R or T = 291 K = `(291-273)^(@)C=10^(@)C`


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