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Class 10 - Science - CHAPTER 1: Chemical Reactions and Equations - Multiple Choice QuestionsQuestion 18
Class 10 - Science - CHAPTER 1: Chemical Reactions and Equations - Multiple Choice Questions
Question. 18
Which of the following are combination reactions?
(i) \(2KClO_3 \xrightarrow{\text{Heat}} 2KCl + 3O_2\)
(ii) \(MgO + H_2O → Mg(OH)_2\)
(iii) \(4Al + 3O_2 → 2Al_2O_3\)
(iv) \(Zn + FeSO_4 → ZnSO_4 + Fe\)
(a)
(i) and (iii)
(b)
(iii) and (iv)
(c)
(ii) and (iv)
(d)
(ii) and (iii)
Detailed Answer with Explanation:
(ii) & (iii) form single products from reactants (combination). (i) is decomposition; (iv) is displacement.