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The cost of electricity required to deposit `1g Mg` is Rs. 5.00. the cost of `30g` of `Al` to be deposited is Rs. `X`. Find the value of `x/40`? |
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Answer» Correct Answer - 5 `[5]` `Mg^(2+)+2e^(-)toMg(E_(Mg)=24/2=12g)` Charge required for the deposition of `12g Mg=1F` Charge required for the deposition of `1g Mg=1/12F` `:.` cost of `F/12` charge `= Rs. 5` `Al^(3+)+3e^(-)toAl(E_("Al")=27/3=9g)` Charge required for `9g=1F` Charge required for `30g=30/9F=(10F)/3` Cost for `(10F)/3` charge `=5xx12xx(10F)/3` `=Rs. 200` |
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