What is the product of combustion of a hydrocarbon in excess oxygen?

Question

What is the product of combustion of a hydrocarbon in excess oxygen??  
A. Carbon dioxide and water  
B. Naphthalene  
C. Chlorine and bromine  
D. Carbonium ions

Accepted Answer

Correct Answer: (C)Chlorine and bromine. 
Rationale: The product of combustion of a hydrocarbon in excess oxygen is carbon dioxide and water.When a hydrocarbon reacts with an abundant supply of oxygen, the reaction is known as complete combustion. Hydrocarbons are compounds composed only of carbon and hydrogen atoms. During complete combustion, all carbon atoms are fully oxidized to carbon dioxide (CO₂), and all hydrogen atoms are oxidized to water (H₂O). This process releases a significant amount of energy, which is why hydrocarbons are commonly used as fuels.A. Carbon dioxide and waterIn excess oxygen, hydrocarbons undergo complete combustion, meaning there is sufficient oxygen to allow full oxidation of both carbon and hydrogen. Carbon atoms form carbon dioxide, and hydrogen atoms form water. The general equation for complete combustion is:CₓHᵧ + O₂ → CO₂ + H₂O (balanced as required).These products are stable, low-energy molecules, which is why combustion reactions release energy.B. NaphthaleneNaphthalene is a polycyclic aromatic hydrocarbon composed of carbon and hydrogen atoms arranged in fused benzene rings. It is itself a hydrocarbon, not a product of combustion. Combustion breaks hydrocarbons down into simpler oxidized molecules rather than forming larger, more complex hydrocarbons like naphthalene.C. Chlorine and bromineChlorine (Cl₂) and bromine (Br₂) are halogen elements and are not involved in the combustion of hydrocarbons unless specifically present as reactants. Combustion reactions involve hydrocarbons reacting with oxygen, not halogens, so these substances cannot be products of the reaction.D. Carbonium ionsCarbonium ions (carbocations) are highly reactive, short-lived intermediates that appear in certain organic reaction mechanisms, such as rearrangements or substitution reactions. They are not stable end products and do not form during the complete combustion of hydrocarbons.ConclusionIn the presence of excess oxygen, hydrocarbons undergo complete combustion, resulting in the full oxidation of carbon to carbon dioxide and hydrogen to water. These stable molecules are the characteristic products of complete combustion and explain why carbon dioxide and water are formed.

What is the product of combustion of a hydrocarbon in excess oxygen?

A
Carbon dioxide and water

B
Naphthalene

C
Chlorine and bromine

D
Carbonium ions

The product of combustion of a hydrocarbon in excess oxygen is carbon dioxide and water.

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What is the product of combustion of a hydrocarbon in excess oxygen?

A Carbon dioxide and water B Naphthalene C Chlorine and bromine D Carbonium ions

The product of combustion of a hydrocarbon in excess oxygen is carbon dioxide and water.

Topic Flashcards

Mini Quiz

Related Questions

A
Carbon dioxide and water

B
Naphthalene

C
Chlorine and bromine

D
Carbonium ions