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A very thin copper plate is electro- pla...

A very thin copper plate is electro`-` plated with gold using gold chloride in `HCl`. The current was passed for `20 mi n`. And the increase in the weight of the plate was found to be `2g.[Au=197]`. The current passed was `-`

A

`0.816 amp`

B

`1.632 amp`

C

`2.448 amp`

D

`3.264 amp`

Text Solution

Verified by Experts

The correct Answer is:
3
Gold chloride `AuCl_(3)`
`m=(M)/(96500xxn)1xxt`
`l=(2xx96500xx3)/(197xx20xx60)=2.448A`.
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Knowledge Check

  • An insulator plate is passed between the plates of a capacitor. Then current .

    A
    always flows from `A` to `B`
    B
    always flows from `B` to `A`
    C
    first flows from `A` to `B` and then from `B` to `A`
    D
    first flows from `B` and `A` and then from `A` to `B`

  • The electrolytic bath used in gold plating of copper articles contains

    A
    molten gold
    B
    `CuSO_(4)`
    C
    `AuCl_(3)`
    D
    `AuCl_(3) + NaCN`

  • A constant current was passed through a solution of AuCl_(4)^(c-) ion between gold electrodes. After a period of 10.0 mi n , the increase in the weight of cathode was 1.314g . The total charge passed through solution is ( atomic weight of AuCl_(4)^(c-)=339)

    A
    `1.16 xx 10^(-2)F`
    B
    `3.5xx10^(-2)F`
    C
    `2xx10^(-2)F`
    D
    `4xx10^(-3)F`
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