Which of the following compound contain most electronegative carbon atom?

detailed solution

Correct option is C

Step - 1Electronegativity of carbon atom depend upon the % s-character.More the % s-character more is the electronegativity of carbon atom.Step - 2in option (1) CH3-CH3 two carbons are SP3   % s-character is 25%.Step - 3in option (2) CH2=CH2 two carbons are SP2                            % s-character is 33%.in option (3) CH≡CH  two carbons are SP  % s-character is 50%.   it contains more electronegative carbon atoms.[Step 5]:in option (4) CH4 carbon is SP3  % s-character is 25%.