2,5-đimetylhêxxan có công thức cấu tạo
\(\eqalign{ & A.\,C{H_3}\mathop {CH}\limits_| C{H_2}C{H_2}\mathop {CH}\limits_| C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,B.\,C{H_3}\mathop {CH}\limits_| C{H_2}\mathop {CH}\limits_| C{H_3} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\, \cr & C.\,\,\,\,\mathop {C{H_2}}\limits_| C{H_2}C{H_2}\mathop {CH}\limits_| C{H_3}\,\,\,\,\,\,\,\,D.\,\mathop {C{H_2}}\limits_| C{H_2}C{H_2}\mathop {C{H_2}}\limits_| \cr & \,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\, \cr} \)
Chọn đáp án A.