`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

`W=ZxxIxxt`
where `Z=("equivalent wt.")/(F)=(12)/(96500)`
`Ixxt=9.65C`
`:.W=(12)/(96500)xx9.65g=12xx10^(-4)g`
`24" g of Mg"^(2+)=1" mole of Mg"^(2+)`
`12xx10^(-4)"g of Mg"^(2+)=(1)/(24)xx12xx10^(-4)` moles
`=5xx10^(-5)` moles.