Question

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

Answer 1

Correct Answer - C
`W=ZxxIxxt` s
Where `Z=("equivalent wt.")/(F)=(12)/(96500)`
`Ixxt=9.65CthereforeW=(12)/(96500)xx9.65g=12xx10^(-4)g`
`25g` of `mg^(2+)=1` mole of `Mg^(2+)`
`12xx10^(-4)g` of `mg^(2+)=(1)/(24)xx12xx10^(-4)`mole