In each of the following groups of substances, pick the one that has the given property.Justify each answer. a. highest boiling point: CCl4., CF4, CBr4 b. lowest freezing point: LiF, F2, HCl c. smallest vapor pressure at 25∘C: CH3, OCH3, CH3CH2OH, CH3CH2CH3   d. greatest viscosity: H2S, HF, H2O2 e. greatest heat of vaporization: H2CO, CH3CH3,CH4 f. smallest enthalpy of fusion: I2, CsBr, CaO

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