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Which of the following are decomposition reactions ?
(i) $\ce{2KClO3 -> 2KCl + 3O2}$
(ii) $\ce{MgO + H2O -> Mg(OH)2}$
(iii) $\ce{2H2O -> H2 + O2}$
(iv) $\ce{Zn + CuSO4 -> ZnSO4 + Cu}$
(i) $\ce{2KClO3 -> 2KCl + 3O2}$
(ii) $\ce{MgO + H2O -> Mg(OH)2}$
(iii) $\ce{2H2O -> H2 + O2}$
(iv) $\ce{Zn + CuSO4 -> ZnSO4 + Cu}$
- (a)(i) and (ii)
- (b)(iii) and (iv)
- (c)(i) and (iii)
- (d)(ii) and (iv)
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(C) / (i) and (iii) (1 Mark)