100 gm mixture of Co and `CO_(2)`  is mixed with 30 mL of `O_(2)` and sparked in eudiometer tube.
Channel: Doubtnut
Date: 2020-04-26

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)