Question
Which of the following species has the highest electron affinity
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The above reaction is of zero order. Half life of this reaction is $50\,min$. The time taken for the concentration of $A$ to reduce to one-fourth of its initial value is $...........\min$(Nearest integer)

(image) $\xrightarrow[{N{H_4}Cl}]{{Zn}}.....?$