1.

Ratio of number of Faradays of electricity required to deposit magnesium, aluminium and sodium in equimolar ratio on electrolysis of their respective molten salt is _____

Answer»

`2 : 3 : 2`
`2 : 1 : 1`
`2 : 3 : 1`
`4 : 6 : 1`

Solution :Electrode REACTIONS involved are
`Mg^(+2) + 2e^(-) rarr Mg`
`AL^(+3) + 3e^(-) rarr Al`
`Na^(+) + e^(-) rarr Na`
1 mole of Mg REQUIRES 2 FARADAYS
1 mole of Al requires 3 Faradays.
1 mole of sodium requires 1 Faraday
Ratio of number of Faradays `= 2 : 3: 1`


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