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Q 1210267110.     A mixture of ethyne `(C_2H_2)` and `H_2` was mixed with 65 ml of `O_2` and exploded in eudiometer tube.
On cooling , it was found to have undergone a contraction of 35 ml. When treated with a `KOH` solution , a further contraction of 34 ml took place and 15 ml of `O_2` alone was left behind. Find the percentage composition of ethyne and `H_2` in the mixture.
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)