Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhyd. CuSO4 and NaCl were added to the beakers A, B and C, respectively. It was observed that there was an increase in the temperature 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 following statements is/are correct?I. In beakers A and B, exothermic process has occurred.II. In beakers A and B, endothermic process has occurred.III. In beaker C, the exothermic process has occurred.IV. In beaker C, endothermic process has occurred. [NCERT Exemplar](a) Only I(b) Only II(c) I and IV(d) II and III

Harshit Singh , 4 Years ago

Grade 12th pass