9.65C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus obtained is completely converted into Grignard reagen t. the number of m oles of the original reagent obtained of

Options

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

Answer

C

Explanation

`Mg^(2+)+2e^(-)rarrMg`
2F,i.e.`2xx96500C` deposit Mg=1mol
`therefore 9.65C` will deposit Mg
`=(1)/(2xx96500)xx9.65=5xx10^(-5)` mol
`RX+MgrarrRMgX`
1 mole of Mg forms G.R.=1mol
`therefore 5xx10^(-5)` mole of Mg will form G.R. `=5xx10^(-5)` mol.