NY Regents Chemistry Exam Jan 2023
Given the equation representing a reaction: 2NaCl → 2Na + Cl2 Which type of reaction does this equation represent? (1) double replacement
(2) decomposition (3) synthesis (4) single replacement
Solution: Here are some easy ways to recognize each reaction.
Double replacement is AB + CD --> AD + CB,
Decomposition is AB --> A + B
Synthesis is A+B --> AB
Single Replacement is A +BC --> AC + B
The reaction represented above is decomposition, choice 2.