Question

7 • • • → • • •
single replacementdisplac
8 • • → • •
9 caco₃ → cao + co₂
10 nacl + agno₃ → nano₃ + agcl
11 zn + 2hcl → zncl₂ + h₂
12 na(s) + cl₂(g) → 2nacl(s)
13 hcl + naoh → nacl + h₂o
14 2h₂o → 2h₂ + o₂
15 zn(s) + cuso₄(aq) → znso₄(aq) + cu(s)

Explanation:

Step1: Identify reaction types

• For 8: It is a synthesis reaction as two substances combine to form one product.
• For 9: It is a decomposition reaction as one compound breaks into two simpler substances.
• For 10: It is a double - replacement reaction as the cations and anions of two different compounds exchange places.
• For 11: It is a single - replacement reaction as zinc replaces hydrogen in hydrochloric acid.
• For 12: It is a synthesis reaction as sodium and chlorine combine to form sodium chloride.
• For 13: It is a neutralization reaction (a type of double - replacement) as an acid and a base react to form a salt and water.
• For 14: It is a decomposition reaction as water breaks into hydrogen and oxygen.
• For 15: It is a single - replacement reaction as zinc replaces copper in copper sulfate.

Answer:

1. Synthesis
2. Decomposition
3. Double - replacement
4. Single - replacement
5. Synthesis
6. Neutralization (Double - replacement)
7. Decomposition
8. Single - replacement