Which one of the following substances is expected to have the highest boiling po

Question

Which one of the following substances is expected to have the highest boiling point? Br_2 Cl_2 F_2 I_2 Which of the following properties indicates the presence of strong intermolecular forces in a liquid? a low heat of vaporization a low boiling point a low vapor pressure None of the above. A liquid boils when its vapor pressure is exactly 1 atmosphere. vapor pressure is equal to, or greater than, the external pressure pushing on it. temperature is equal to 273 K (standard temperature). temperature is greater than room temperature. Which of the following would be expected to have the highest vapor pressure at room temperature? ethanol, bp = 78 degree C water, bp = 100 degree C methanol, bp = 65 degree C acetone, bp = 56 degree C Which one of the following substances should exhibit hydrogen bonding in the liquid state? PH_3 CH_3OH H_2S CH_4 Arrange the following in order of increasing boiling point: RbCl, CH_3Cl, CH_3OH, CH_4. CH_4

Explanation / Answer

1) I2 (since as go down the group molarmass increases and also incresase Vander Walls of forces)

2) a low vapour pressure ( due to strong inter molecular forces boiling point of liquid is high as a result it doesnot easily escape)

3) vapour pressure is excatly 1.0atm

4) acetone ( since methanol, ethanol and water forms hydrogen bonding but in case of acetone it is not possible)

5) CH3OH

6) A

since RbCl is ionic compound so it has greater boiling point

CH3OH forms hydrogen bonding so it has greater boiling point than others (CH3Cl, CH4)

molar mass of CH3Cl is high compare with CH4 so it has higher boiling point than methane

7) A

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