Q.

10 ml of an unknown hydro carbon gas (x) requires 12.5 ml of oxygen for just half of the combustion reaction to be completed. Hydro carbon (x) is

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a

C3H4

b

C2H6

c

C2H2

d

C2H4

answer is C.

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Detailed Solution

10mlCxHy+(x+y4)O2xCO2+y2H2 x+y4=12.5(12) 10(x+y4)=25ml x+y4=25

x=2;y=2 hit & trial method

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