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A 20 mL mixture of CO, CH4, and Helium (...

A 20 mL mixture of CO, `CH_4`, and Helium (He) gases is exploded by an electric discharge at room temperature with excess of oxygen. The volume contraction is found to be 13 mL. A further contraction of 14 mL occurs when the residual gas is treated wityh KOH solution. Find out the composition of the gaseous mixture in terms of volume percentage.

A

`" CO = 10 "cm^(3), CH_(4) =" 6 "cm^(3)" and "He =" 4 "cm^(3)`

B

`" CO = 10 "cm^(3), CH_(4) =" 4 "cm^(3)" and "He =" 6 "cm^(3)`

C

`" CO = 6 "cm^(3), CH_(4) =" 10 "cm^(3)" and "He =" 4 "cm^(3)`

D

`" CO = 4 "cm^(3), CH_(4) =" 6 "cm^(3)" and "He =" 10 "cm^(3)`

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The correct Answer is:
B
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