Justify the following reactions are redox reactions :
`4BCI_(3)(g)+3LiAIH_(4)(s)to2B_(2)H_(6)(g)+3LiCI(s)+3AICI_(3)(s)`

Explanation

`overset(+3-1)(4BCI_(3))(g)+overset(+1+3-1)(3LiAH_(4))(s)tooverset(-3+1)(2B_(2)H_(6))(g)+overset(+1-1)(3LiCI)(s)`
The reaction involves the reduciton of `BCI_(3)` became the oxidation number of B decreases from +3 to -3 and the oxidation of `LiAIH_(4)` as the oxidation number of H increases from -1 to +1 .So it is a redox reaction