Reduction involves

Among $Cl^{-}$,$Br^{-}$,and $I^{-}$,the correct order for being oxidized to dihalogen is:

In the reaction $8 \ Al + 3 \ Fe_3O_4 \to 4 \ Al_2O_3 + 9 \ Fe$,the number of moles of electrons transferred by $1 \ mol$ of reductant is:

When ammonia is heated with cupric oxide,each molecule of ammonia loses how many electrons?

Which of the following processes occurs during the reaction of $Cu$ with $AgNO_3$ solution?

For the reaction $Ag_2O + H_2O + 2e^- \to 2Ag + 2OH^-$,which of the following is true?