Question

Which among the following is (are) double displacement reaction(s)?

(i) Pb + CuCl₂ → PbCl₂ + Cu
(ii) Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl
(iii) C + O₂ → CO₂
(iv) CH₄ + 2O₂ → CO₂ + 2H₂O
(A) (i) and (iv) (B) (ii) only
(C) (i) and (ii) (D) (iii) and (iv)

Answer 1

(B) (ii) only