1.

At at 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 291 R. 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, (pi)/(C) = RT . ` But slpe = 291 R
`there RT = 291 R RARR T = 291 K`
`thereforeR T = (291 - 273)^(2)C = 18^(@)C`


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