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Explain in why on addition of 1 mole of ...

Explain in why on addition of 1 mole of NaCl to 1L of water, the boiling point of water increases, while addition of 1 mole of methyl alcohol to 1 L of water decreases its boiling point .

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NaCl is a non-volatile solute. On adding NaCl to water, vapour pressure of lowered and hence boiling point of water increases. Methyl alcohol is more volatile than water. On adding methyl alcohol into water, vapour pressure of solution is greater than that of water. Hence, boiling point of water decreases.
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Explain in why on addition of 1 moe of NaCl to 1L of water, the boiling point of water increases, while addition of 1 mole of methyl alcohol to 1 L of water decreases its boilbing point .

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Knowledge Check

  • The boiling point of water is

    A
    `0^(@)C`
    B
    `100 ^(@)C`
    C
    `373 K`
    D
    (b) and (c )
  • The boiling point of water is

    A
    `0^(@)C`
    B
    `100^(@)C`
    C
    373 K
    D
    (b) and (c)
  • When boiling point of water is reached,

    A
    water exists in liquid state.
    B
    water exists in gaseous state
    C
    water exists in liquid and gaseous state.
    D
    water evaporates
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