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1. Which of the following is not a physical change?
2. 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 following statement(s) is(are) correct?
Which one of the following statement(s) is(are) correct?
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