Question
Arrange $S,\,O$ and $Se$ in ascending order of electron affinity
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$NO\,\xrightarrow{{{O_2}}}A \rightleftharpoons D$
$A\xrightarrow{{NaOH\,\,(aq.)}}[B + C]$

| Exp. | $[A]\,(mol\,L^{-1})$ | $[B]\,(mol\,L^{-1})$ | Initial rate $(mol\,L^{-1}\,s^{-1})$ |
| $1.$ | $2.5\times 10^{-4}$ | $3\times 10^{-5}$ | $5\times 10^{-4}$ |
| $2.$ | $5\times 10^{-4}$ | $6\times 10^{-5}$ | $4\times 10^{-3}$ |
| $3.$ | $1\times 10^{-3}$ | $6\times 10^{-5}$ | $1.6\times 10^{-2}$ |
