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Balram Rana
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Asked: 2021-12-16T04:16:51+00:00 In:

Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous 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(s) is (are) correct?

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Poll Results

0%[A] (i) only
0%[B] (ii) only
100%[C] (i) and (iv) ( 2 voters )
0%[D] (ii) and (iii)
Based On 2 Votes

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(i) In beakers A and B, exothermic process has occurred.
(ii) In beakers A and B, endothermic process has occurred.
(iii) In beaker C, exothermic process has occurred.
(iv) In beaker C, endothermic process has occurred.

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    1 Answer

    1. [C] (i) and (iv)
      In beakers A and B, heat is given, so the temperature of the solution rises, so it is an exothermic reaction whereas in beaker C the heat is absorbed by the water, hence the temperature drops, so it is an endothermic process.

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