Which of the following balanced chemical equations represents a combustion reaction?

CHEMISTRY · Single correct · A Level · Chemistry · Alkanes · Alkanes

Problem

Which of the following balanced chemical equations represents a combustion reaction? (a) 4 Fe(s)+3 O2(g)→2 Fe2O3(s)4\,\mathrm{Fe}(s)+3\,\mathrm{O_2}(g)\rightarrow2\,\mathrm{Fe_2O_3}(s) (b) C3H8(g)+Cl2(g)→C3H7Cl(g)+HCl(g)\mathrm{C_3H_8}(g)+\mathrm{Cl_2}(g)\rightarrow\mathrm{C_3H_7Cl}(g)+\mathrm{HCl}(g) (c) 2 C3H7OH(l)+9 O2(g)→6 CO2(g)+8 H2O(g)2\,\mathrm{C_3H_7OH}(l)+9\,\mathrm{O_2}(g)\rightarrow6\,\mathrm{CO_2}(g)+8\,\mathrm{H_2O}(g) (d) 2 CO(g)+O2(g)→2 CO2(g)2\,\mathrm{CO}(g)+\mathrm{O_2}(g)\rightarrow2\,\mathrm{CO_2}(g)

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