Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous `CuSO_(4)` 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 followig statement (s) is (are) correct? 1. In beakers A and B, exothermic process has occurred. 2. In beakers A and B, endothermic process has occurred. 3. In beaker C, exothermic process has occurred. 4. In beaker C, endothermic process has occurred.A. (i) onlyB. (ii) onlyC. (i) and (iv)D. (ii) and (iii)

Three beakers labelled as A, B and C each containing 25 mL of water we

1.	Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous `CuSO_(4)` 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 followig statement (s) is (are) correct? 1. In beakers A and B, exothermic process has occurred. 2. In beakers A and B, endothermic process has occurred. 3. In beaker C, exothermic process has occurred. 4. In beaker C, endothermic process has occurred.A. (i) onlyB. (ii) onlyC. (i) and (iv)D. (ii) and (iii)
Answer» Correct Answer - C Exothermic reactions have occurred in beakers A and B while reaction taking place in beaker C is of endothermic nature.

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