Hint: In order to find which of the given reactions is reversible, we must first have an idea about what a reversible reaction is? A reversible reaction is said to be a type of chemical reaction that can take place in both directions, i.e., forward and backward.
Complete step by step answer: Let us first understand the reversible reactions. A reversible reaction is said to be a type of chemical reaction that can take place in both directions, i.e., forward and backward. We can say that the reversible reaction in other words is a reaction in which the reactant can be converted into a product and the products can react back to give a reactant. Let us discuss the given question. - Transfer of heat by radiation, transfer of heat by conduction, and Electrical heating of a nichrome wire is an irreversible reaction as it cannot be brought back to its initial state. Therefore, Option (A), (B), and (D) is the incorrect options. Isothermal compression is a reversible reaction, as the reaction can be brought back to its initial state. So, the correct answer is “Option C”.
Note: We have to remember that an irreversible reaction is different from a reversible reaction. The reaction in which the entire reactants can be converted into the product and this reaction cannot be reversed back is said to be the irreversible reaction.