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Sodium metal can be extracted by either ...

Sodium metal can be extracted by either Castner's Process or Down's process
Castner's process.
Electrolyte `to` fused `NaOH`
Cathode and anode are made up of a steel rod and `Ni` cylinder respectively the reaction takes place as follows :
At cathode `Na^(+)+e^(-)toNa`
At anode `OH^(-)to(1)/(2)H_(2)O+(1)/(4)O_(2)uarr+e^(-)`
Down's process :
Electrolyte `to` fused `NaCl` and `CaCl_(2)`
Cathode and anode are ring shaped iron metal and graphite respectively. The reaction takes place as follows :
`Na^(+)+e^(-)toNa`
`Cl^(-)to(1)/(2)Cl_(2)uarr+e^(-)`
In Castner's process some sodium metal us lost due to

A

Reaction with dissolved `O_(2)` in molten `NaOH`

B

It's high reactivity, it attacks other substances present in the system

C

High temperature at which some of it vapourizes

D

All of these

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Sodium metal can be extracted by either Castner's Process or Down's process Castner's process. Electrolyte to fused NaOH Cathode and anode are made up of a steel rod and Ni cylinder respectively the reaction takes place as follows : At cathode Na^(+)+e^(-)toNa At anode OH^(-)to(1)/(2)H_(2)O+(1)/(4)O_(2)uarr+e^(-) Down's process : Electrolyte to fused NaCl and CaCl_(2) Cathode and anode are ring shaped iron metal and graphite respectively. The reaction takes place as follows : Na^(+)+e^(-)toNa Cl^(-)to(1)/(2)Cl_(2)uarr+e^(-) CaCl_(2) is used along with NaCl due to

Sodium metal can be extracted by either Castner's Process or Down's process Castner's process. Electrolyte to fused NaOH Cathode and anode are made up of a steel rod and Ni cylinder respectively the reaction takes place as follows : At cathode Na^(+)+e^(-)toNa At anode OH^(-)to(1)/(2)H_(2)O+(1)/(4)O_(2)uarr+e^(-) Down's process : Electrolyte to fused NaCl and CaCl_(2) Cathode and anode are ring shaped iron metal and graphite respectively. The reaction takes place as follows : Na^(+)+e^(-)toNa Cl^(-)to(1)/(2)Cl_(2)uarr+e^(-) Instead of graphite, nickel anode can't be used in Down's process because

Knowledge Check

  • At anode in the electrolysis of fused NaCl:

    A
    `Na^(+)` is oxidised
    B
    `Cl^(-)` is oxidised
    C
    `Cl^(-)` is reduced
    D
    `Na^(+)` is reduced

  • The cathode and anode in a photocell are respectively.

    A
    semi cylindrical metal plate and square plate.
    B
    semi cylindrical metal plate and straight wire.
    C
    straight wire and semi-cylindrical metal plate.
    D
    a square plate and semi-cylindrical metal plate.

  • In the Castner's process for the extration of sodium, the anode is made of …... metal

    A
    Copper
    B
    Iron
    C
    Sodium
    D
    Nickel

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