Question

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

(i) \[\ce{Pb + CuCl -> PbCl2 + Cu}\]

(ii) \[\ce{Na2SO4 + BaCl2 -> BaSO4 + 2NaCl}\]

(iii) \[\ce{C + O2 -> CO2}\]

(iv) \[\ce{CH4 + 2O2 -> CO2 + 2H2O}\]

विकल्प

• (i) and (iv)

• (ii) only

• (i) and (ii)

• (iii) and (iv)

Answer 1

(ii) only