Which among the following is (are) double displacement reaction (s)?
(i) `Pb+CuCl_(2)rarrPbCl_(2)+Cu`
(ii) `Na_(2)SO_(4)+BaCl_(2)rarrBaSO_(4)+2NaCl`
(iii) `C+O_(2)rarrCO_(2)`
(iv) `CH_(4)+2O_(2)rarrCO_(2)+2H_(2)O`

Options

A. (i) and (iv)
B. (ii) only
C. (i) and (ii)
D. (iii) and (iv)

Answer

b

Explanation

Double displacement reaction is the reaction in which two different atoms or group of atoms are mutually exchanged. In this reaction `(Na_(2)SO_(4) + BaCl_(2) to BaSO_(4) +2NaCl)`, sodium and barium were mutually exchanged.