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During electrolysis of water the amount ...

During electrolysis of water the amount of gas collected in one of the test tubes is double the amount collected in the other why ?

Text Solution

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During electrolysis of water, the water molecule decomposes to give hydrogen and oxygen gas. In a water molecule hydrogen and oxygen are present in `2:1` ratio, hence the amount of hydrogen is double the amount of oxygen.
`2H_(2)Ooverset("electric current")(to)2H_(2)+O_(2)`.
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Knowledge Check

  • Measurement of the amount of dry gas collected over a water from volume of moist gas is based on :

    A
    Gay Lussac's law
    B
    Boyle's law
    C
    Charles' law
    D
    Dalton's law of partial pressure.

  • A gas that cannot be collected over water is :

    A
    `N_(2)`
    B
    `SO_(2)`
    C
    `O_(2)`
    D
    `PH_(3)`.

  • Which of the following salts shall cause maximum cooling when one mole of the salt is dissolved in thee same amount of water ? (integral heat of solution at 298 k given for each solute)

    A
    `KNO_3, Delta H = 35 cdot 4 k J mol^(-1)`
    B
    `NaCl, Delta H =+ 5 cdot 35 k J mol^(-1)`
    C
    `KOHl, Delta H =- 55 cdot 6 k J mol^(-1)`
    D
    `KBr, Delta H =- 83 cdot 3 k J mol^(-1)`

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