Question

Three beakers labelled as a,b and c each c ontaining 25ml of water were taken. a small amount of naoh, anhydrous cuso4 and nacl were added to the beakers a,b,c respectively. oit was observed that there was an increase in the temperature of the solution contained in beakers a and b, whereas in case of beaker c.the temperature of the solution falls. which one of the following staements is correct
(i) in beakers a and b ,exothermic process has occured.
(ii) in beakers a and b , endothermic process had occured (iii) in beaker c exothermic process has ocurred (iv) in beaker c endothermic process has occurred

Answer 1

Answer:   -   C

Chemical reaction in beakers A and B gives out heat. Hence the temperature of the solution increases. Thus, we can call it an exothermic reaction. In beaker C, heat is absorbed from water instead and hence the temperature decreases. Thus, we can call it an endothermic process.