Which of the following compound(s) has/have percentage of carbon same

1.	Which of the following compound(s) has/have percentage of carbon same as that in ethylene (C2H2 )? (a) propene (b) ethyne(c) benzene (d) ethane
Answer» (a) propene Molar mass of carbon Percentage of carbon in ethylene(C₂H₆ ) = (Molar mass of carbon) / (Molar mass) x 100 = 24/28 × 100 = 85.71% Percentage of carbon in propene (C₃H₆ ) = 24/28 × 100 = 85.7 1%

Which of the following compound(s) has/have percentage of carbon same as that in ethylene (C2H2 )? (a) propene (b) ethyne(c) benzene (d) ethane

Answer»

(a) propene

Molar mass of carbon

Percentage of carbon in ethylene(C₂H₆ ) = (Molar mass of carbon) / (Molar mass) x 100

= 24/28 × 100

= 85.71%

Percentage of carbon in propene (C₃H₆ ) = 24/28 × 100

= 85.7 1%