Classify each of the following reactions as combination, decomposition, displacement or double displacement reactions:

Classify each of the following reactions as combination, decomposition, displacement or double displacement reactions:

(a) Zn (s) + 2AgNO3 (aq) ⎯⎯→ Zn(NO3)2 + 2Ag (s).

Ans: – Displacement reaction.

(b) 2KNO3 (s) heat ⎯⎯⎯→ 2KNO2 + O2 (g).

Ans: – Decomposition reaction.

(c) Ni (NO3)2 (aq) + 2NaOH (aq) ⎯⎯→ Ni(OH)2 (s) + 2NaNO3 (aq).

Ans: – Double displacement reaction.

(d) 2KClO3 (s) heat ⎯⎯⎯→ 2KCl (s) + 3O2 (g).

Ans: – Decomposition reaction.

(e) MgO (s) + C (s) ⎯⎯→ CO (g) + Mg (s).

Ans: – Combination reaction.

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