Question

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

displacement reaction.

(i) H2 + Cl2⎯→ 2HCl

(ii) 2KClO3⎯⎯Heat → 2KCl + 3O2

(iii) Zn + CuSO4⎯→ ZnSO4 + Cu

Blue Colour less

(iv) 2Pb(NO3)2⎯Heat→ 2PbO(s) + 4NO2(g) + O2(g)

(v) NaOH + HCl ⎯→ NaCl + H2O

(vi) BaCl2 + H2SO4⎯→ BaSO4 + 2HCl

(vii) CaO + CO2⎯→ CaCO3

(viii) CaCO3⎯→ CaO + CO2

(ix) 2KI + Cl2⎯→ 2KCl + I2

(x) 2H2O ⎯Electricty→ 2H2 + O2​

Answer 1

Answer:

1) combination reaction

2)decomposition reaction (u can also call thermal decomposition)

3)displacement reaction

4)decomposition reaction

5)double displacement reaction

6)double displacement reaction

7)combination reaction

8)decomposition reaction

9)displacement reaction

10)decomposition reaction (u can also call this electrolysis )