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

(i) Pb + CuCl 2 → PbCl 2 + Cu

(ii) Na 2 SO 4 + BaCl 2 → BaSO 4 + 2NaCl

(iii) C + O 2 → CO 2

(iv) CH 4 + 2O 2 → CO 2 + 2H 2 O

(A) (i) and (iv) 

(B) (ii) only

(C) (i) and (ii) 

(D) (iii) and (iv)



A double displacement reaction is the one in which the two reacting species exchange their ions


Let’s look at all the options

  1. (i) is an example of a single displacement reaction as only one ion is being exchanged.
  2. (ii) is an example of a double displacement reaction because both of the reacting compounds are exchanging ions.
  3. (iii) is an example of combination reaction because two substances are combining to form a single product.
  4. (iv) is a redox reaction where CH 4 is getting oxidized and O 2 is getting reduced.


So, the correct answer is (b) (ii) only

  1. Class 10
  2. Chapter 1 Class 10 - Chemical Reactions and Equations (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo