Question

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

1. `"Pb" + "CuCl"_2 -> "PbCl"_2 + "Cu"`
2. `"Na"_2"SO"_4 + "BaCl"_2 -> "BaSO"_4 + 2"NaCl"`
3. `"C" + "O"_2 -> "CO"_2`
4. `"CH"_4 + 2"O"_2 -> "CO"_2 + 2"H"_2"O"`

पर्याय

• (i) and (iv)

• (ii) only

• (i) and (ii)

•  (iii) and (iv)

Answer 1

(ii) only

Explanation -

Only reaction (ii) is double displacement in nature.