1.

Which of the following is a (are) combination reaction (s) ?

Answer»

`CaO + H_(2)O to Ca(OH)_(2)`
`Zn+H_(2)SO_(4) to ZnSO_(4) +H_(2)`
`Ca(OH)_(2) + CO_(2) toCaCO_(3) + H_(2)O`
`2Al_(2)O_(3) to 4Al +3O_(2)`

Answer :A::C


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