Question 8

The products of the combustion of propane in the presence of oxygen gas are CO2 and H2O.

During the combustion of propane, the reaction with oxygen yields carbon dioxide (CO2) and water (H2O) as the primary products, consistent with the complete combustion process.

A) C + H2

This option suggests that carbon (C) and hydrogen gas (H2) are products of the reaction, which is incorrect. The complete combustion of propane does not produce elemental carbon or hydrogen, but rather oxidized products such as CO2 and H2O.

B) CH2 + H2O

While this option includes water (H2O), it incorrectly states that CH2 is a product. The combustion of propane does not yield such a hydrocarbon; instead, it fully oxidizes to produce CO2 and H2O.

C) CO2 + H2

This option correctly includes carbon dioxide (CO2) as one of the products but incorrectly lists hydrogen gas (H2) as a product of combustion. In a complete combustion reaction, hydrogen is fully oxidized to form water (H2O), not left as elemental hydrogen.

D) CO2 + H2O

This option accurately represents the products of propane combustion. When propane reacts with oxygen, the complete combustion results in the production of carbon dioxide (CO2) and water (H2O), aligning with the principles of combustion chemistry.

Conclusion

The correct answer, CO2 + H2O, is definitively right because it accurately reflects the complete combustion of propane in the presence of oxygen, producing fully oxidized products. All other options either misrepresent the products or include incorrect substances that do not occur in this reaction.