Question

The reaction between carbon and oxygen can be represented as:
\[C(g)+{{O}_{2}}(g)\to C{{O}_{2}}(g)+heat\]
In which of the following type(s), the above reaction can be classified?
I. Combustion reaction
II. Displacement reaction
III. Endothermic reaction
IV. Combination reaction
A. (I) and (III)
B. (I), (III) and (IV)
C. (I) and (IV)
D. (I) only

Answer 1

Hint: The reaction of carbon with oxygen forms carbon dioxide as the product. This is also called oxidation because oxygen is going to be added to carbon in the reaction. In this reaction carbon forms a covalent bond with oxygen.

Complete step by step answer:
- In the question it is given that the reaction of carbon with oxygen forms carbon dioxide and releases some amount of heat during the reaction.
- The given reaction is as follows.
\[C(g)+{{O}_{2}}(g)\to C{{O}_{2}}(g)+heat\]
- Combustion means burning of one chemical in presence of oxygen, and after the combustion some amount of energy is going to be released. It is happening in the given reaction.
- If energy is going to be released in any chemical reaction then the reaction is called exothermic reaction.
- In the given reaction energy is going to be released, so the given reaction is an exothermic reaction.
- In the formation of carbon dioxide the carbon is going to combine with oxygen, here there is no displacement of any chemical by other chemicals. Then the given reaction is an example of a combination reaction.
- Therefore the given reaction is an example for combustion reaction and combination reaction. So, I and IV are correct.

- So, the correct option is C.

Note: If energy is going to be absorbed in any chemical reaction then the chemical reaction is called endothermic reaction. Ammonium chloride dissolves in water by absorbing energy from the environment. It is a best example for endothermic reaction.