`9.65C` of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a Grignard reagent. The number of moles of the Grignard reagent obtained is

Options

A. `5xx10^(-4)`
B. `1xx10^(-4)`
C. `5xx10^(-5)`
D. `1xx10^(-5)`

Answer

C

Explanation

1 mol of Grignard reagent (RMgX) contains
1 mol of magnesium. Thus, we need to calculate moles of magnesium.
According to Faraday.s first law,
`w=Z xx Q=(24xx9.65)/(2xx96500)`
or `w=1.2xx10^(-3)g`.
Moles of `Mg=(1.2xx10^(-3))/(24)=5xx10^(-5)` mol
`:.` Moles of Grignard reagent obtained
`=5xx10^(-5)` mol.