The major product of the following reaction is :

The given plots represent the variation of the concentration of a reactant R with time for two different reactions (i) and (ii). The respective orders of the reactions are :

Among the following, the molecule expected to be stabilized by anion formation is :
C₂, O₂, NO, F₂

The one that will show optical activity is :
(en = ethane-1,2-diamine)