Question

The reaction in which hydrogen is added to substance and oxygen is removed from substance, is called __ reaction.

Answer 1

The reaction in which hydrogen is added to substance and oxygen is removed from substance, is called reduction reaction. The substance is said to be reduced. Reduction is any chemical reaction that involves the gaining of electrons. It refers to the side that accepts electrons. When iron reacts with oxygen it forms a chemical called rust. In that example, the iron is oxidized and the oxygen is reduced.