At certain temperature, vapour pressure of a solution of acetone (p° = 150 mm) and chloroform (p° = 120 mm) in the molar ratio 1 ∶ 4 is found to be 121 mm. The data suggest the two solution form
1
ideal solution
2
non ideal solution positive deviation
3
non ideal solution negative deviation
4
ΔHsoln = 0
5
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