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Combustion Chemistry Quiz

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Questions and Answers

What is the primary characteristic that defines combustion?

It occurs only in solid substances.

It is an exothermic reaction that does not involve any gas.

It requires the presence of oxygen. (correct)

It produces only heat without light.

In the complete combustion of methane, which products are formed?

C and H2O

CO and H2O

CO2 and H2O (correct)

O2 and C

What results from insufficient oxygen during combustion?

The fuel is converted into biomass.

Carbon monoxide and unburnt carbon may be formed. (correct)

Only carbon dioxide is produced.

The reaction is halted completely.

When considering the combustion equation 2C2H6 + xO2 → 4CO2 + 6H2O, what is the balanced value of x?

<p>8 (C)</p> Signup and view all the answers

Which of the following alkanes is incorrectly associated with its combustion reaction?

<p>C2H6 producing only CO2 (B)</p> Signup and view all the answers

Flashcards

Combustion

A chemical process where a substance reacts quickly with oxygen (O2) to produce heat and light.

Combustible

A substance that undergoes combustion; it burns in the presence of oxygen.

Incomplete Combustion

A chemical reaction where there is not enough oxygen present for the fuel to burn completely. This results in the production of carbon monoxide (CO) and soot (unburnt carbon).

Complete Combustion

A reaction where a substance reacts completely with oxygen, producing heat and light. All of the fuel is converted to products like carbon dioxide and water.

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