Home
Class 12
CHEMISTRY
The boiling points of NH(3) , H(2)O and ...

The boiling points of `NH_(3) , H_(2)O` and HF are higher than those of the hydrides of the subsequent members of the group. Give your reasons.

Text Solution

Verified by Experts

Hydrogen is covalently bonded with more electronegative atoms such as F, O and N. The weak electrostatic attractive force is called hydrgen bond.
Because of the association of molecules through hydrogen bonds these hydrides have high boiling points. This is beacuse some extra energy is required to break the hydrogen bond.
The electronegativities of the higher members of `N, O, F` groups are less. So their hydrides are less polar and cannot form hydrogen bonds. Hence the boiling members of the N, O, F group have low boiling points.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • HYDROGEN AND ITS COMPOUNDS

    VGS PUBLICATION-BRILLIANT|Exercise Long Answer Questions|20 Videos

  • HYDROGEN AND ITS COMPOUNDS

    VGS PUBLICATION-BRILLIANT|Exercise Long Answer Questions|20 Videos

  • ENVIRONMENTAL CHEMISTRY

    VGS PUBLICATION-BRILLIANT|Exercise LONG ANSWER QUESTIONS|6 Videos

  • MODEL PAPER

    VGS PUBLICATION-BRILLIANT|Exercise Section - C|8 Videos

Similar Questions

Explore conceptually related problems

The boiling points of NH_(3),H_(2)O and HF are higher than those of hydrides of the subsequent members of the group. Give your reasons.

The boiling points of carboxylic acids are higher than those of alcohols. Explain with suitable examples.

Knowledge Check

  • The boiling point of p-nitrophenol is higher than that of o-nitrophenol because

    A
    `NO_2` group at para position behaves in a different way from that at ortho position
    B
    Intramolecular hydrogen bonding exists in p-nitrophenol
    C
    There is intermolecular hydrogen bonding in p-nitrophenol
    D
    p-nitrophenol has a higher molecular weight than o-nitrophenol

  • The relative nucleophilicity of NH_3, H_2O and HF towards bromoethane is

    A
    `H_3N gt H_2O gt HF`
    B
    `HF gt H_2O gt NH_3`
    C
    `NH_3 gt HF gt H_2O`
    D
    `H_2O gt NH_3 gt HF`

  • The boiling point D_(2)O is greater than H_(2)O it if because

    A
    `D_(2)O` has a lower ionic product
    B
    `D_(2)O` has a lower dielectric constant
    C
    `D_(2)O` is an associated liquid
    D
    The molecular weight of `D_(2)O` is greater than `H_(2)O`

    • Similar Questions

    Explore conceptually related problems

    Would you expect the hydrides of N,O and F to have lower boiling points than the hydrides of their sub sequent group members? Give reasons.

    Boiling points of nitroalkanes are much higher than those of hydrocarbons of comparable mass - give reasons.

    The boiling point of D_2 O is greater than H_2O it is because

    The boiling point of D_2O is greater than H_2O it is because

    (A) The boiling points of alkyl halides decrease in the order RI > RBr > RCI > RF (R) The boiling points of alkyl halides are considerably higher than those of the hydrocarbons of comparable molecular mass.

    Home
    Profile