An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108g more at the end of the electrolysis. The volume of oxygen evolved at STP:

Options

A. `5.6 cm^(3)`
B. `550 cm^(3)`
C. `22.4 cm^(3)`
D. `11.2 cm^(3)`

Answer

A

Explanation

`("Wt. of Ag deposited")/("Wt. of" O_(2) "produced") = (108)/(8)`
` (0.108)/("Wt. of" O_(2)) = (108)/(8)`
Wt. of `O_(2) = (0.108 xx 8)/(108)`
`= 8 xx 10^(-3) g`
Vol. of `O_(2) = (22400)/(32) xx 8 xx 10^(-3)`
`= 5.6 cm^(3)`.