CHAPTER-1 Chemical Reactions and Equations
Multiple Choice Questions
QUESTION-5
- 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 statement(s) is(are)
correct?
(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) (ii) and (iii)
SOLUTION
Answer is (c) (i) and (iv)
Explanation:
Exothermic processes will increase the temperature whereas exothermic processes will decrease the temperature.