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)
Solution:
(b). Only reaction (ii) is double displacement in nature.