Formulae & Functional Groups

• O/N 2012/P12/Q38

An alcohol contains 60% carbon by mass.

What is its formula?

A CH3OH​​ 

B C2H5OH​​ 

C C3H7OH​​ 

D C4H9OH

Answer: ​​ C

Explaination

To find out the percentage of carbon, we will use the following formula

% of Carbon =Molar mass of Carbon Molecular mass of Compound×100