Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. $$\begin{array} { c c c c }
- \mathrm { CH } = \mathrm { CH } _ { 2 } & - \mathrm { CH } _ { 3 } & - \mathrm { CHO } & - \mathrm { OH } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Question

Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. $$\begin{array} { c c c c } 
- \mathrm { CH } = \mathrm { CH } _ { 2 } & - \mathrm { CH } _ { 3 } & - \mathrm { CHO } & - \mathrm { OH } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Quizplus · Accepted Answer

The priority is determined by atomic number; oxygen (OH) has the highest, followed by carbon in CHO, then the double-bonded carbon in CH=CH2, and finally the single-bonded carbon in CH3.

Rank the Following Groups in Order of Decreasing Priority According