Welcome to the Quiz!

This quiz contains 9 questions from a mix of 1 subtopics.

Diagram showing the increase in chain length of alkanes with more carbon atoms.

As the chain length (number of carbon atoms) of alkanes increases, they become:


More viscous 

Less viscous

[0/1]

More volatile

Less volatile

[0/1]

More flammable

Less flammable 

[0/1]

0

/

3

Increasing the chain length (number of carbons) of alkanes leads to:

(Select all that apply)

Higher boiling point

Lower boiling point

Lower melting point

Higher melting point

0

/

2

ethanol / oxygen / water / nitrogen


What is the word equation for the complete combustion of a hydrocarbon?


hydrocarbon + ➔ carbon dioxide +

oxygen
water

0

/

2

C7H16 + ?O2 ➔ ?CO2 + H2O


The above combustion reaction needs to be balanced. Start by balancing the number of H2O molecules so that the number of hydrogen atoms is equal on both sides of the equation.

8

[0/1]

C7H16 + ?O2 ➔ CO2 + 8H2O


Next, balance the number of CO2 molecules by making sure there are an equal number of carbons on both sides of the equation.

7

[0/1]

C7H16 + O2 ➔ 7CO2 + 8H2O


Finish by balancing the number of O2 molecules, so that there are an equal number of oxygen atoms on both sides of the equation.

11

[0/1]

0

/

3

Illustration of flames representing the combustion process.

Is combustion an exothermic or endothermic reaction?

Exothermic

Endothermic 

0

/

1

Please balance the following combustion equation:


C3H8 + O2 ➔ CO2 + H2O

3
4
5

0

/

3

During a combustion reaction, are carbon and hydrogen oxidised or reduced?

Oxidised

Reduced 

0

/

1

Balance the following combustion equation:


C2H6 + O2 ➔ CO2 + H2O

4
6
7
2

0

/

4

For alkanes, increasing chain length (increasing the number of carbons) leads to molecules that are:

(Select all that apply)

More flammable

More volatile

Less flammable

Less volatile

0

/

2