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Define hydrogen bond. Is it weaker or st...

Define hydrogen bond. Is it weaker or stronger than the van der Waals forces?

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Hydrogen bond represents strong dipole dipole interactions between the H the highly electronegative atoms (F,0 are N) present in different bonds belonging to either different molecules or some molecule van Waals forces are also dipole forces, consult unit-5 on State of Matter.
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Knowledge Check

  • In the van der Waals equation

    A
    `b` is the volume occupied by the gas molecules
    B
    `b` is four times the volume occupied by the gas molecules
    C
    `b` is the correction factor for intermolecular attraction
    D
    None of these

  • r_("(van der Waal)") is

    A
    half the bond length
    B
    twice the bond length
    C
    half of the distance between centres of nuclei of two non-bonded atoms of adjacent molecules in solid state
    D
    None of these

  • The units of the van der Waals constant a are

    A
    `mol L^(-1)`
    B
    `atm L^(-2) mol^(2)`
    C
    `atm L^(2) mol^(-2)`
    D
    `L mol^(-1)`

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