Question

Which of the following reactions is an example of a redox reaction?

• A. $XeF _{6}+ H _{2} O \rightarrow XeOF _{4}+2 HF$
• B. $XeF _{6}+2 H _{2} O \rightarrow XeO _{2} F _{2}+4 HF$
• C. $XeF _{4}+ O _{2} F _{2} \rightarrow XeF _{6}+ O _{2}$
• D. $XeF _{2}+ PF _{5} \rightarrow[ XeF ]^{+} PF _{6}^{-}$

Answer 1

Answer: (C)

$XeF _{4}+ O _{2} F _{2} \rightarrow XeF _{6}+ O _{2}$

Answer 2

$Xe$ is oxidised from $+4$ in $(XeF _{4})$ to $+6$ in $(XeF _{6})$
Oxygen is reduced from $+1$ (in $O _{2} F _{2}$ ) to zero (in $O _{2}$)

So, the correct option is (C): $XeF _{4}+ O _{2} F _{2} \rightarrow XeF _{6}+ O _{2}$