\\\\(2Cl(g) \\rightarrow Cl_{2} (g)\\\\)Entropy is decreasing \\\\((-ve)\\\\) in the reaction as no. of molecules are decreasing which reduces the randomness of the system. Further the reaction is exothermic since a bond is being formed, i.e., \\\\(\ riangle H\\\\) is also \\\\(-ve\\\\).Hence, option C is correct