Question

Which of the following reactions is not a redox reaction?

• A. $CuO_{(s)}+H_{2(g)} \to Cu_{(s)}+H_{2}O_{(g)}$
• B. $Fe_{2}O_{3(s)}+3CO_{(g)}\to 2Fe_{(s)}+3CO_{2(g)}$
• C. $4 BCl_{3(g)}+3LiAlH_{4(s)} \to 2B_{2}H_{6(g)}+3LiCl_{(s)}+3AlCl_{3(s)}$
• D. $2K_{(s)}+F_{2(g)} \to 2K^{+}F^{-}_{(s)}$

Answer 1

Answer: (C)

$4\, \overset{+3}{B} \overset{-1}{Cl_{3(g)}}+\overset{+1}{Li}\overset{+3}{Al}\overset{-1}{H_{4(s)}} \to 2\,\overset{+3}{B_{2}}\overset{-1}{H_{6(g)}}+3\,\overset{+1}{Li}\overset{-1}{Cl_{(s)}}+3\,\overset{+3}{Al}\overset{-1}{Cl_{3(s)}}$
This is not a redox reaction