Which one of the following is not a combination reaction? A. HNO3 (aq) + KOH (aq) → H2O (l) + KNO3 (aq) B. 2CaO + 3CO2 → 2CaCO3 C. Na2O + CO2 → Na2CO3 D. 4Fe + 3O2 → 2Fe2O3

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Miljenko Barbir · Answer 1 · 2017-12-12T11:13:29+0000

Since we see that the only one that results in two compounds is a, that is teh correct answer.

Answer: A. HNO3 (aq) + KOH (aq) → H2O (l) + KNO3 (aq)

Zachary Canann · Answer 2 · 2017-12-17T08:20:35+0000

Answer:

A. HNO3 (aq) + KOH (aq) → H2O (l) + KNO3 (aq)

Step-by-step explanation:

A combination reaction is a chemical reaction in which two or more substances combine to form a single substance under suitable conditions. As a result of a chemical reaction new substances are formed. Thus, these reactions are also called synthesis. Combination reactions are of three types. Reaction between metals and non-metals, reaction between two non-metals and Reaction between elements and compounds. Thus, among the given options A does not fall in the group of combination reaction.

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Which one of the following is not a combination reaction? A. HNO3 (aq) + KOH (aq) → H2O (l) + KNO3 (aq) B. 2CaO + 3CO2 → 2CaCO3 C. Na2O + CO2 → Na2CO3 D. 4Fe + 3O2 → 2Fe2O3

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