alkanes

Question 1

What are alkanes

Answer 1

-Alkanes are saturated hydrocarbons.

-Alkanes are used as fuels.

Question 2

What is petroleum a mixture off

Answer 2

-Petroleum is a mixture consisting mainly of alkane hydrocarbons that can be separated by fractional distillation.

Question 3

What are the conditions of cracking?

Answer 3

-Cracking involves breaking C–C bonds in alkanes.

Thermal cracking takes place at high pressure and high temperature and produces a high percentage of alkenes (mechanism not required).

Question 4

What are the conditions of catalytic cracking?

Answer 4

-Catalytic cracking takes place at a slight pressure, high temperature and in the presence of a zeolite catalyst and is used mainly to produce motor fuels and aromatic hydrocarbons (mechanism not required).

Question 5

Explain the economic reasons for cracking alkanes.

Answer 5

-The products of cracking, shorter carbon chains are more valuable than the starting materials

Question 6

What are the two types of combustion

Answer 6

-Complete
-Incomplete

Question 7

What does the internal combustion engine produce

Answer 7

-The internal combustion engine produces a number of pollutants including NOx, CO, carbon and unburned hydrocarbons.

-These gaseous pollutants from internal combustion engines can be removed using catalytic converters.

Question 8

What does combustion of hydrocarbons containing sulfur lead to

Answer 8

-Combustion of hydrocarbons containing sulfur leads to sulfur dioxide that causes air pollution.