Which of the Following Compounds is an Alkane

Question

Which of the following compounds is an alkane?
A) C5H10
B) C6H10
C) C7H18
D) C8H18

Accepted Answer

Alkanes have the general formula CnH2n+2, meaning they have only single covalent bonds between carbon atoms and contain only carbon and hydrogen. Only compound D fits this criteria as it has 18 carbon atoms and 38 hydrogen atoms, following the formula C18H38. The other compounds have additional atoms such as S (sulfur) and some have an odd number of hydrogen atoms, indicating they are not alkanes.