Question

Which of the following reactions are exothermic?



1) C + O2 → CO22) 2Mg + O2 → 2MgO3) CuSO4 + 5H2O → CuSO4.5H2O4) All the above
A) 1
B) 2
C) 3
D) 4

Answer 1

2nd reaction is exothermic reaction