Question

Give one example of oxidation-reduction reaction which is also
a) a combination reaction
b) a displacement reaction

Answer 1

Hint: A redox reaction is a chemical reaction in which electrons are exchanged between two reactants that are involved. Changes in the oxidation states of the reacting species can be used to identify this electron transfer.

Complete answer:
A combination reaction is one in which two or more reactants combine to form a single product. A combination reaction is also known as a synthesis reaction.
A displacement reaction is one in which a more reactive element is expelled from its aqueous salt solution and replaced by a less reactive element. It is also known as a substitution reaction.
a) The following is an example of an oxidation-reduction process that is also a Combination reaction:
 $2Cu+O_2\stackrel{Heat}{\to }2CuO$
A combination reaction is a type of redox reaction. In a combination reaction, two components are combined to produce a single product.
b) The following is an example of an oxidation-reduction process that is also a Displacement reaction:
 $CuO+H_2\stackrel{Heat}{\to }Cu+H_{2}O$
Displacement reaction is also a redox reaction, as the less reactive reactant is reduced and the more reactive reactant is oxidised in this reaction.

Note:
All reactions are not always redox reactions. Non-redox reactions include double decompositions, acid-base neutralisation reactions, and precipitation reactions. Sanitizing water and bleaching materials both use oxidation-reduction processes. Electrolysis, which is based on redox processes, is also used to make certain key compounds. Various chemicals, such as caustic soda, chlorine, and others, are made using redox processes.