Question

Which of the following group shows +m and -I effect?

• A. $-F$
• B. $-OCOR$
• C. $-COR$
• D. $-COOH$

Answer 1

Answer: (A), (B)

The correct options are
A $-F$
B $-OCOR$

$-OCOR$ group shows +m and -I effect.
-I effect (electron attracting or electron withdrawing effect ) implies that $-OCOR$ group attracts electrons more strongly than hydrogen atom.
+m effect means the transfer of electron pair is away from the atom.