How many of the following groups strictly exert a Positive Inductive () effect? — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

The groups exerting a $+I$ (electron donating) effect are: $-O^-$, $-COO^-$, $-CH_3$, $-C_2H_5$, $-D$, and $-T$. The remaining groups ($-NO_2$, $-NH_3^+$, $-CN$) are highly electronegative or positively charged and exert a $-I$ (electron withdrawing) effect.