A mixture of H_2  and butyne (C_4O_8) was collected in a Eudiometer tube . then 80 ml of oxygen were also introdu

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Q 1220667511.     A mixture of H_2  and butyne (C_4O_8) was collected in a Eudiometer tube . then 80 ml of oxygen were also introduced .the resulting mixture of all the gasses of KOH solution which caused a contradicts was exploded .After cooling resulting gaseous mixture passes through 32 ml and 16 ml of oxygen alone were left behind .
Calculate % volume butyne in original gas mixture
A

 15%

B

 25%

C

 30%

D

 20%

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