MCAT Question of the Day
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    Q:

    		 Both nucleophilic substitution and addition deal with the attack of a nucleophile onto an electrophile. The primary difference between the two, however, is that
    		 

    A

    		 nucleophilic addition involves a good leaving group while nucleophilic substitution does not.

    B

    		 nucleophilic addition can follow either SN1 or SN2 mechanisms while nucleophilic substitutions can only follow SN1 mechanisms.

    C

    		 nucleophilic substitution and addition are competing mechanisms for the same reaction.

    D

    		 nucleophilic addition involves the replacement of a π bond with two new σ bonds while nucleophilic substitution primarily occurs with the replacement of existing σ bonds.



    Molecular Bonding |
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