Question

Which one of the following groups leads to development of ẟ+ on carbon atom sharing a bond with that particular substituent/group ?

• A. $-F$
• B. $-N{O}_2$
• C. Both a and b
• D. $-C{H}_2^{-}$

Answer 1

The correct option is C Both a and b

Electron withdrawing groups$(-Fand-N{O}_2)$ lead to development of ẟ+ on the carbon atom sharing a bond with them as EWG pull electrons towards themselves due to their higher electronegativity.
Electron donating group$(-C{H}_2^{-})$ leads to development of ẟ- on the carbon atom sharing a bond with it.
Hence the correct option is c.