100 gm mixture of Co and `CO_(2)` is mixed with 30 mL of `O_(2)` and sparked in eudiometer tube. The residual gas after treatment with aq. KOH has a volume of 10 mL which remains unchanged when treated with alkline pyrogallol . If all the volume are under the same conditions, point out the correct option(s)

Options

A. The volume of `CO` that reacts, is `60mL`
B. The volume of `CO` that remains unreacted, is `10mL`
C. The volume of `O_(2)` that remains unreacted, is `10mL`
D. The volume of `CO_(2)` that gets absorbed by aq. `KOH` is `90mL`.

Answer

A, B, D

Explanation

`CO+CO_(2)=100mL`
`x + y =100mL`
`CO+(1)/(2)O_(2)rarrCO_(2)`
`{:("initial",x,30,,),("final",x-60," "0," "60,):}`
`KOH` absorbed `CO_(2)=10`
`{:(x-60=10),(x=70),(y=30mL):}`
absorbed `CO_(2)=y+60=90mL`