Which of the following is produced when hydrogen burns in air?

Rationale

Water vapor is produced when hydrogen burns in air.

When hydrogen combusts in the presence of oxygen from the air, the reaction primarily produces water vapor as the end product. The chemical reaction can be simplified to 2H₂ + O₂ → 2H₂O, indicating that hydrogen and oxygen combine to form water.

A (Carbon monoxide) YOUR ANSWER

Carbon monoxide is produced from the incomplete combustion of carbon-containing fuels, not from hydrogen combustion. Since hydrogen does not contain carbon, it cannot produce carbon monoxide when it burns in air. Therefore, this choice is not applicable to the burning of hydrogen.

B (Carbon dioxide) YOUR ANSWER

Like carbon monoxide, carbon dioxide is a product of the combustion of carbon-based fuels. Hydrogen itself does not yield carbon dioxide during combustion, as there are no carbon atoms involved in the reaction. Thus, this choice is also incorrect.

C (Nitrous oxide) YOUR ANSWER

Nitrous oxide is typically produced from reactions involving nitrogen compounds, particularly during high-temperature combustion processes in engines. The burning of hydrogen does not involve nitrogen in a way that would produce nitrous oxide, making this choice irrelevant to the question.

D (Water vapor) CORRECT

Water vapor is the correct answer, as it is the primary product of hydrogen burning in air. The reaction between hydrogen and oxygen results in the formation of water molecules, which can exist as vapor at typical combustion temperatures.

Conclusion

In summary, the combustion of hydrogen in air results in the formation of water vapor, distinguishing it from combustion reactions that involve carbon-based fuels, which produce carbon monoxide or carbon dioxide. The key outcome of hydrogen combustion is the generation of water, highlighting its clean-burning properties and importance in various applications, including fuel cells and energy production.

Which of the following is produced when hydrogen burns in air?

Water vapor is produced when hydrogen burns in air.

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