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Why liquids have a definite volume but n...

Why liquids have a definite volume but no definite shape?

Text Solution

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This is because the intermolecular forces are strong enough to hold the molecules together but not so strong as to fix them into definite positions (as in solids). Instead, they posses fluidity and hence no definite shape.
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Knowledge Check

  • Liquids have definite volume because

    A
    molecules seprate from each other easily
    B
    molecules do not seprate from each other
    C
    thermal energy of molecules is greater than intermolecular force
    D
    all of the above

  • Substance P at -80^(@) C has definite volume but no definite shape and possess fluidity. At -55^(@) C, substance P neither has definite volume nor definite shape. Which of the following could be the melting and boiling points of substance P?

    A
    `{:("Melting point","Boiling point"),(-92^(@)C,-60^(@)C):}`
    B
    `{:("Melting point","Boiling point"),(-85^(@)C,-40^(@)C):}`
    C
    `{:("Melting point","Boiling point"),(-80^(@)C,-56^(@)C):}`
    D
    `{:("Melting point","Boiling point"),(-70^(@)C,-50^(@)C):}`

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