Which of the following molecules are constitutional isomers? $$\begin{array} { c c c c }
\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { CH } ( \mathrm { OH } ) \mathrm { CH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OCH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { COCH } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Question

Which of the following molecules are constitutional isomers? $$\begin{array} { c c c c } 
\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH } & \mathrm { CH } _ { 3 } \mathrm { CH } ( \mathrm { OH } ) \mathrm { CH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { OCH } _ { 3 } & \mathrm { CH } _ { 3 } \mathrm { COCH } _ { 3 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Quizplus · Accepted Answer

Constitutional isomers have the same molecular formula but different connectivity. Molecules I, II, and III all have the molecular formula C3H8O, but differ in the connectivity of their atoms.

Which of the Following Molecules Are Constitutional Isomers A) I, II, IV B) II, III, IV C) I

Which of the Following Molecules Are Constitutional Isomers A) I, II, IV
B) II, III, IV
C) I