Question

For the complete combustion , 1 mole of organic compound requires 3 mole of oxygen gas. what could be the formula of a compound ?
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Answer 1

Answer:

C2H4

Explanation:

CxHy + 3 O2 =x CO2 +y/2 H2O

hence 3× 2 = 2x + y/2

hence 12 = 4x + y

let x = 1 y = 8. not possible as y cant ve more than 4

so by hit and trial let x = 2 then y 4

C2H4 it is none other than ETYLENE!!