9.65 C of electric current is passed through fused anhydrous `MgCI_(2)` The magnesium metal thus obtained is completely converted in to grignard reagent th number of moles of gringnard reagent obtained is

Options

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

Answer

C

Explanation

96500 C current produces 12 g Mg
9.65 C current produces
`=(12xx9.65)/(96500)`
`=1.2 xx10^(-3) g Mg`
`=1.2xx10^(-3)/(24)`
`=5xx10^(-5)` Mg
`R-X + Mg rarr R Mg X`(Grignard reagnet )
Hence number of moles of R Mg x produced `=5xx10^(-5)`