NCERT Exemplar Solutions
Class 10 - Science - CHAPTER 1: Chemical Reactions and Equations - Multiple Choice Questions
Question 7

Question. 7

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)

(ii) is precipitation/double displacement; (i) single displacement; (iii) & (iv) are combination/combustion.