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The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

H2O > C2H5OH > CS2
CS2 > C2H5OH > H2O
H2O > CS2 > C2H5OH
CS2 > H2O > C2H5OH

Correct Answer: H2O > C2H5OH > CS2

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