Which of the listed reactions is elementary

1. A.
   $C_2H_5I(g) \longrightarrow C_2H_4(g) + HI(g)$
2. B.
   $2NO_2Cl(g) \longrightarrow 2NO_2(g) + Cl_2(g)$
3. C.
   $2NO_2(g) + F_2(g) \longrightarrow 2NO_2F(g)$
4. D.
   $2NO(g) + Cl_2(g) \longrightarrow 2NOCl(g)$

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1. A.
   $\mathrm{O_{3(g)} \rightarrow O_{2(g)} + O_{(g)}}$
2. B.
   $\mathrm{2NO_2Cl_{(g)} \rightarrow 2NO_{2(g)} + Cl_{2(g)}}$
3. C.
   $\mathrm{2NO_{2(g)} + F_{2(g)} \rightarrow 2NO_2F_{(g)}}$
4. D.
   $\mathrm{2NO_{(g)} + Cl_{2(g)} \rightarrow 2NOCl_{(g)}}$

Tap an option to check your answer.