Question

Benzene, ethane and ethylene are just three of a large number of hydrocarbons-compounds that contain only carbon and hydrogen. By using law of proportions and following data, the mass ratio of carbon in benzene, ethane and ethylene is a:b:c. Then calculate the value of a,b and c.

• A. $a=6,b=2,c=3a$
• B. $a=5,b=2,c=1$
• C. $a=3,b=2,c=2$
• D. None of these

Answer 1

The correct option is A $a=6,b=2,c=3a$

According to given data, mass ratio of :
$C:H$
Benzene $4.61:0.39$
= $12:1$
Ethane $4:1$
ethylene $6:1$
So, mass ratio of $C$ (w.r.t. $H=1g$) in benzene, ethane and ethylene are $12:4:6=6:2:3$.