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Three beakers labelled as A, B and C each containing 25 mL of waterwere taken. A small amount of NaOH, anhydrous CuSO 4 and NaCl were added to thebeakers A, B and C respectively. It was observed that there was an increase in thetemperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the followingstatement(s) is (are) correct?