How long will it take for a current of 3 amperes to decompose 36g of water? (Eq. wt. of hydrogen is 1 and that of oxygen is 8)

Options

A. 36 hours approx.
B. 18 hours approx
C. 9 hours approx.
D. 4.5 hours approx.

Answer

A

Explanation

`H_(2)O to 2H^(+) + O^(2-)`
Thus number of moles of electrons required for decomposition of water =2 moles Quantity of electricity or change required `=2 xx 96800` C
Time `=(2xx96500)/(3xx60xx60)=18` hours