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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`

A

Both (i) and (iii)

B

Both (iii) and(iv)

C

Both (ii) and (iv)

D

Both (ii) and (iii)

Text Solution

Verified by Experts

The correct Answer is:
D
A reaction in which two or more reactants react together to form a single product, is called a combination reaction. In reaction (ii), `MgO and H_(2)O` combine to form `Mg(OH)_(2)` and in reaction (iii), Al and `O_(2)` combine to form `Al_(2)O_(3)`.
Reaction (i) is decomposition and reaction(iv) is displacement reaction.
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