🔍 Free Preview — first 3 questions
Question 1
Which of the following is an example of a combination (synthesis) reaction?
ACaCO₃ → CaO + CO₂
B2H₂ + O₂ → 2H₂O
C2NaCl → 2Na + Cl₂
DFe + CuSO₄ → FeSO₄ + Cu
Question 2
A decomposition reaction is the reverse of a combination reaction. Which of the following is a decomposition reaction?
A2H₂ + O₂ → 2H₂O
BFe + S → FeS
C2KClO₃ → 2KCl + 3O₂
DZn + CuSO₄ → ZnSO₄ + Cu
Question 3
In the reaction Zn + CuSO₄ → ZnSO₄ + Cu, which metal is more reactive?
ACopper (Cu)
BZinc (Zn)
CThey are equally reactive
DCannot be determined from