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Which of the following are combination ...

Which of the following are combination reactions?
` (i) 2KClO_(3)overset("Heat")to2KCl+3O_(2)`
`(ii) MgO+H_(2)OtoMg(OH)_(2)`
`(iii) 4Al+3O_(2)to 2Al_(2)O_(3)`
`(iv) Zn+FeSO_(4)to ZnSO_(4)+Fe`

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Which of the following are combination reactions? (i) 2KClO_3 overset (Heat) rarr 2KCl+ 3O_2 (ii) MgO + H_2O rarr Mg(OH)_2 (iii) 4Al + 3O_2 rarr 2Al_2O_3 (iv) Zn + FeSO_4 rarr ZnSO_4 + Fe

Which of the following are combination reactions? 2KClO_3to2KCl+3O_2 MgO+H_2OtoMg(OH)_2 4Al+3O_2to2Al_2O_3 Zn+FeSO_4toZnSO_4+Fe

State the type of reaction represented by the following equation : 2KClO_(3) overset("heat") to 2KCl +3O_(2)