For the reactions, $\mathrm{C}+\mathrm{O}_2 \longrightarrow \mathrm{CO}_2 ; \Delta \mathrm{H}=-393…

For the reactions, $\mathrm{C}+\mathrm{O}_2 \longrightarrow \mathrm{CO}_2 ; \Delta \mathrm{H}=-393 \mathrm{~J}$ $2 \mathrm{Zn}+\mathrm{O}_2 \longrightarrow 2 \mathrm{ZnO} ; \Delta \mathrm{H}=-412 \mathrm{~J}$
  1. carbon can oxidise Zn
  2. oxidation of carbon is not feasible
  3. oxidation of Zn is not feasible
  4. Zn can oxidise carbon

Solution

$\Delta \mathrm{H}$ negative shows that the reaction is spontaneous. Higher value for $\mathrm{Zn}$ shows that the reaction is more feasible.

Asked in: JEE Main 2002

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