Question

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?
[NCERT Exemplar]
(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.
(a) (i) only
(b) (ii) only
(c) (i) and (iv) (d) (i) and (111)
of metals can be prevented
​

Answer 1

Answer:

answer is c

Explanation:

in a n b exothermic reaction n in c endo

Answer 2

Answer:

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