Question

> CO2
3. Which of the following reaction is/are double displacement reaction(s)
(1) Pb + Cuci
→ PbCl2 + Cu
(ii) Na2SO4 + Bach
2NaCl + BaSO4
(iii) C+02
(iv) CH4 + 202
→ CO2 + 2H2O
(a) Only (1)
(b) (i) and in
(c) (i), (iii) and (iv)
(d) None of the above​

Answer 1

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 SO

4

2−

ion combines with Ba

2+

ion to form two new compounds as sodium chloride (NaCl) and barium sulphate (BaSO

4

) respectively.