Question

The reaction between carbon and oxygen can be represented as:
\[C\left( s \right){\text{ }} + {\text{ }}{O_2}\left( g \right) \to C{O_2}\left( g \right) + heat\]
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). \[\left( {\text{I}} \right)\;{\text{and}}\left( {{\text{III}}} \right)\]
(B). \[\left( {\text{I}} \right){\text{, }}\left( {{\text{II}}} \right){\text{and}}\left( {{\text{III}}} \right)\].
(C). \[\left( {\text{I}} \right)\;{\text{and}}\left( {{\text{IV}}} \right)\].
(D). \[\left( {\text{I}} \right)\;\]only.

Answer 1

Hint:In this question, the concept of the combustion is used. As we know when we burn something in the presence of air then combustion reaction takes place. In combination reaction, the substance of the reactants combines to form the product.

Complete step by step solution:
-Combination reaction is the reaction in which two or more reactants combine to form the single compound.
-A combustion reaction is the reaction in which a substance reacts with the presence of oxygen gas and which releases the amount of energy in the form of gas or light and heat is produced during the reaction.
-We are given in a reaction,
\[C\left( s \right){\text{ }} + {\text{ }}{O_2}\left( g \right) \to C{O_2}\left( g \right) + heat\]
Consider the given reaction,
-In the reaction, on the reactants side, we can see that solid carbon is burnt in presence of air oxygen. And on the product side we have received the energy as the gas carbon dioxide and the amount of heat is produced. Thus, here we can see the combustion reaction.
-In the above reaction, we can also observe that the carbon atom is with the oxygen to form the carbon dioxide. So, the combination reaction takes place.
-So, we can see that combustion reaction and the combination reaction takes place in this reaction.
Therefore, the option (C) is correct.

Note:
As we know that the endothermic reactions are those reactions in which substance, or the reactants, absorb the energy from the surrounding area to form the product. And the displacement reaction is the reaction in which a more reactive atom displaces the less reactive molecule.