Browning of the chopped apple can be minimized by :

An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?

When air is blown from mouth into a test tube containing limewater, the limewater turns milky. This is due to the presence of

Cambium is an example of

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

Which one among the following is an example of oxidation reaction?