Answer: The correct answer is Option D.
Explanation:
From the given options:
Option A: Endothermic reactions are the reactions where the energy of the reactants is less than the energy of the products. The total enthalpy of the reaction is positive. \(\Delta H_{rxn}=+ve\)
Option B: Reversible reactions are the reactions where reactants forming products in turn react together to give the reactants back.
Option C: Irreversible reactions are the reactions where reactants only form products and there is no turning back.
Option D: Exothermic reactions are the reactions where the energy of the reactants is more than the energy of the products. The total enthalpy of the reaction comes out to be negative. \(\Delta H_{rxn}=-ve\)
Hence, the correct answer is Option D.
