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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

(i) and (iii)

B

(iii) and (iv)

C

(ii) and (iv)

D

(ii) and (iii)

Text Solution

Verified by Experts

The correct Answer is:
d
Combination reaction is a reaction in which two or more reactants react together to form a single product. In reaction (ii), MgO and `H_(2)O` combine to form Mg(OH), and in reaction (iii), Al and `O_(2)` combine to form `2Al_(2)O_(3)`. Reaction (i) is decomposition reaction and reaction (iv) is displacement reaction.
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OSWAL PUBLICATION-CHEMICAL REACTIONS-NCERT EXEMPLAR (Multiple Choice Questions)
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  2. The following reaction is an example of a 4NH(3)(g) +5O(2)(g) to 4NO...

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  3. Which of the following statements about the given reaction are correct...

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  4. Which of the following are exothermic processes? 1. Reaction of wate...

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  5. Three beakers labelled as A, B and C each containing 25 mL of water we...

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  6. A dilute ferrous sulphate solution was gradually added to the beaker c...

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  7. Which among the following is (are) double displacement reaction (s)? ...

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  8. Which among the following statement (s) is /are true? Exposure of silv...

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  9. Solid calcium oxide reacts vigorously with water to form calcium hydro...

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  10. Barium chloride on reacting with ammonium sulphate forms barium sulpha...

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  11. Electrolysis of water is a decomposition reaction. The mole ratio of h...

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  12. Which of the following is (are) an endothermic process(es)? (i) Dil...

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  13. In the double displacement reaction between aqueous potassium iodide a...

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  14. Which of the following gases can be used for storage of fresh sample o...

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  15. The following reaction is used for the preparation of oxygen gas in th...

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  16. Which one of the following processes involve chemical reactions?

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  17. In which of the following chemical equations, the abbreviations repres...

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  18. Which of the following are combination reactions? (i) 2KClO(3)over...

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