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Write the order of thermal stability of ...

Write the order of thermal stability of the hydrides of Group 16 elements.

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Thermal stability depends on bond dissociation energy of M - H. Smaller is the size of central atom stronger will be the bond· higher will be bond dissociation. Thus thermally more stable thus the order is `H_(2)O` > `H_(2)S` > `H_(2)Se` > `H_(2)Te`> `H_(2)P_(O)`.
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Knowledge Check

  • The boiling point of hydrides of group 16 elements are in the order

    A
    `H_2 O gt H_2 S gt H_2 Te gt H_2 Se`
    B
    `H_2 Te gt H_2 Se gt H_2 S gt H_2O`
    C
    `H_2O gt H_2 Te gt H_2Se gt H_2 S`
    D
    `H_2 Te gt H_2 O gt H_2 S gt H_2 Se`

  • The order of the atomic radii down the group in group 16 is

    A
    S`gt` Se `gt` Te`gt` Po`gt` O
    B
    O`gt` S`gt` Se`gt` Te`gt` Po
    C
    Po `gt` Te`gt` Se`gt` S`gt` O
    D
    Te`gt` S`gt` Se`gt` `gt` Po

  • The correct order of thermal stability of hydrogen halides (HX) is: HIgtHBrgtHCLgtHF , HFgtHCLgtHBrgtHI , HCLltHFltHBrltHI , HIgtHCLgtHFgtHBr .

    A
    `HIgtHBrgtHCLgtHF`
    B
    `HFgtHCLgtHBrgtHI`
    C
    `HCLltHFltHBrltHI`
    D
    `HIgtHCLgtHFgtHBr`

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