help 8, 9, 10 What is the predominant intermolecular force in CH3CH2OH? London-d

Question

help 8, 9, 10 What is the predominant intermolecular force in CH3CH2OH? London-dispcrsion forces induced djpole-dipole attraction ion-dipole attraction hydrogen-bonding ionic bonding The Intermolecular force(s) responsible for the fact that CH4 has the lowest boiling point in the set CH4, S1H4, GeHt SnH4 is/are mainly hydrogen bonding but also dipole-dipole interactions dipole-dipole interactions London dispersion forces hydrogen bonding mainly London-dispcrsion forces but also dipole-dipole interactions Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

Explanation / Answer

#8) D hydrogen bonding

Reason=CH3CH2OH has polar -O-H bond, due to high difference of electronegativity, between O and H.So there exists electrostatic forces of attraction between O and H atoms of molecule(extensive H-bonding).

#9) C     London Dispersion forces

Reason=The electronegativity difference between C-H atom is not significant so the bond is not polar.So no, dipole-dipole interaction or hydrogen bonding is possible

#10) C      CH3NH2

reason=     N-H is sufficiently polar, so hydrogen bonding exists between molecules

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