Which of the following is not an example of redox reaction?

Redox is a reaction in which both oxidation and reduction will take place simultaneously . It is obvious that if one substance gives electron there must be another substance to accept these electrons . In some reactions, same substance is reduced as well as oxidised, these reactions are termed as disproportionation reactions. For calculating equivalent mass in redox reaction change in oxidtaion number is realted to n-factor which is reciprocal of molar ratio. Which of the following is an example of redox reaction ?

Redox is a reaction in which both oxidation and reduction will take place simultaneously . It is obvious that if one substance gives electron there must be another substance to accept these electrons . In some reactions, same substance is reduced as well as oxidised, these reactions are termed as disproportionation reactions. For calculating equivalent mass in redox reaction change in oxidtaion number is realted to n-factor which is reciprocal of molar ratio. Which of the following is an example of redox reaction ?

One of the following is not an example for a redox reaction , it is :

Which of the following reaction are example of redox reactions?

Which of the following reactions is an example of redox reactions ?

Which one of the following reaction is not an example of redox reaction?

Which one is not an example of redox reaction ?