40 ml of CO was mixed with 100 ml of O2 and the mixture was exploded. On cooling, the reaction mixture was shaken with KOH. What volume of gas is left?
A
60 ml of O2
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B
80 ml of O2
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C
20 ml of CO
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D
40 ml of CO2
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Solution
The correct option is B 80 ml of O2 Reaction: CO+12O2⟶CO2 40ml20ml40ml↓