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Why ureas has a sharp melting point but ...

Why ureas has a sharp melting point but glass does not ?

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Urea is a crystalline solid whereas glass is amorphous. Crystalline solids have sharp melting points whereas amorphous solids do not posses sharp melting points.
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Knowledge Check

  • Which of the allotropes of sulphur has no sharp melting point and is insoluble in CS_(2) ?

    A
    Rhombic sulphur
    B
    Monoclinic sulphur
    C
    Plastic sulphur
    D
    None of the above

  • Which has highest melting point ?

    A
    Silicon
    B
    Lead
    C
    Tin
    D
    Diamond

  • Which has the highest melting point?

    A
    `LiCl`
    B
    `BeCl_(2)`
    C
    `BCl_(3)`
    D
    `C Cl_(4)`

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