Arrange the following compounds in order of decreasing reactivity in electrophilic substitution:
A)V II I III IV
B)II V III I IV
C)IV I III V II
D)III II I IV V
E)IV V II I III

Question

Arrange the following compounds in order of decreasing reactivity in electrophilic substitution: 
A)V > II > I > III > IV 
B)II > V > III > I > IV 
C)IV > I > III > V > II 
D)III > II > I > IV > V 
E)IV > V > II > I > III

Quizplus · Accepted Answer

The reactivity of compounds in electrophilic substitution is determined by the presence of electron-donating or electron-withdrawing groups on the ring. Compound II has a strong electron-donating group (-NH2) and will be the most reactive, followed by V (-OH) and III (-Cl) which also have electron-donating groups. Compound I has no significant group and will be less reactive, while IV has an electron-withdrawing group (-NO2) and will be the least reactive. Option B correctly arranges the compounds in descending order of reactivity.

Arrange the Following Compounds in Order of Decreasing Reactivity in Electrophilic