Which of the following molecules are aliphatic hydrocarbons? $$\begin{array} { c c c c }
\mathrm { CH } _ { 3 } \mathrm { CH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 2 } = \mathrm { CH } _ { 2 } & \mathrm { CH } _ { 3 } \mathrm { OCH } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Question

Which of the following molecules are aliphatic hydrocarbons? $$\begin{array} { c c c c } 
\mathrm { CH } _ { 3 } \mathrm { CH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 2 } = \mathrm { CH } _ { 2 } & \mathrm { CH } _ { 3 } \mathrm { OCH } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Quizplus · Accepted Answer

Aliphatic hydrocarbons are compounds composed only of carbon and hydrogen atoms arranged in straight or branched chains or non-aromatic rings. I (ethane) and III (ethylene) are aliphatic hydrocarbons. II and IV contain oxygen, so they are not purely hydrocarbons.

Which of the Following Molecules Are Aliphatic Hydrocarbons A) I, II, III B) I and III C) II

Which of the Following Molecules Are Aliphatic Hydrocarbons A) I, II, III
B) I and III
C) II