Are all combination reactions redox? Can oxidation occur without reduction? Are all chemical reactions involving a difference in the electronegativity of the molecules or atoms always a redox reaction? If there is an exchange of electrons will it always be redox reaction?

Are all combination reactions redox? Can oxidation occur without reduc

1.	Are all combination reactions redox? Can oxidation occur without reduction? Are all chemical reactions involving a difference in the electronegativity of the molecules or atoms always a redox reaction? If there is an exchange of electrons will it always be redox reaction?
Answer» Are all combination reactions redox? Can oxidation occur without reduction? Are all chemical reactions involving a difference in the electronegativity of the molecules or atoms always a redox reaction? If there is an exchange of electrons will it always be redox reaction?