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Q.
Which one of the following is not an ideal solution?
Chhattisgarh PMTChhattisgarh PMT 2004
Solution:
An ideal solution is one which possesses following characters
(i) obeys Raoult's law
(ii) $\Delta V_{\text {maxing }}=0$
(iii) $\Delta H_{\text {maxing }}=0$
(iv) Mole fraction = active mass,
Similar, liquid pairs (like benzene + toluene, $n$-hexane + $n$-heptane, $C_{2} H _{5} Br + C _{2} H _{5} I$ mixture, $C _{2} H _{5} Cl + C _{2} H _{5} Br$ mixture, $C _{6} H _{6}+ C _{6} H _{5} CH _{3}$ mixture etc.) form ideal solution.
So, $C_{2} H_{5} I+C_{2} H_{5} O H$ mixture is not an ideal solution.
Because this does not obey the above rule and fact hence, form non-ideal solution.