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

Answer:

II only is the correct answer

Answer 2

$\huge\mathfrak\pink{Answer}$

Double displacement reactions are those in which ions of the reactants are exchanged to form new compounds as products.

In option (ii),

Na+ ion combines with Cl- ion and SO4^2− ion combines with Ba^2+ ion to form two new compounds as sodium chloride (NaCl) and barium sulphate (BaSO4) respectively.