Which one is the strongest nucleophilic site in the following species ?
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The most acidic proton and the strongest, nucleophilic nitrogen in the following compound respectively, are

The strongest base and nucleophile among the following is:

Which of the following is the strongest nucleophile ?

Which of the following is the strongest nucleophile ?

Which of the following is the strongest nucleophile ?

The order of decreasing nucleophilicities of the following species is :

Which one is strongest electrolyte in the following ?