Question

Which of the following is Aromatic Hydrocarbon?

• A. $C_2{H}_2$
• B. $C_3{H}_8$
• C. $C_5{H}_{12}$
• D. $C_6{H}_6$

Answer 1

The correct option is D $C_6{H}_6$

$C_6{H}_6$ belongs to Aromatic hydrocarbons having general formula $C_n,H_{2n-6y}$ (where $y:$ no. of benzene rings, $n\ge 6$ )
If $n=6,y=1$ then $C_n{H}_{2n-6y}$ become $C_6{H}_6$
$\therefore C_2{H}_2$ belongs to alkynes having general formula $C_n{H}_{2n-2}$.
$C_3{H}_8$ belongs to alkanes having general formula $C_n{H}_{2n+2}$
$C_5{H}_{12}$ belongs to alkanes having general formula $C_n{H}_{2n+2}$