Catalytic Converters(Complete)

Question 1

What are the exhaust fumes major sources of pollution?

Answer 1

CO- Carbon monoxide.
NO- Nitrogen monoxide.
NO2- Nitrogen dioxide.
Unburned hydrocarbons.

Question 2

For each of the following, what are the harmful effects:
CO
NO
NO2
Unburned hydrocarbons

Answer 2

CO- poisonous.
NO- forms acid rain
NO2- forms acid rain.
Unburned hydrocarbons- poisonous, carcinogenic, form smog.

Question 3

For each of the following, what does the catalytic converter change them in to:
CO
NO
NO2
Unburned hydrocarbons

Answer 3

CO- CO2.
NO- N2.
NO2- N2.
Unburned hydrocarbons- H2O.

Question 4

Identify two reactions which are catalysed in the catalytic converter in a car.
What are the benefits of each.

Answer 4

CO + NOx = CO2 + N2
CO is toxic and NO forms acid rain.

CH4 + CO + NOx = H2O + CO2 + N2
CH4 is a green house gas.

Question 5

What are the catalysts in the catalytic converter?

Answer 5

Platinum.
Rhodium.
Palladium.

Question 6

Why are they coated on a ceramic honeycomb?

Answer 6

To increase the surface area.

Question 7

What are the catalysts and reactants an example of?

Answer 7

Heterogeneous catalysis as catalysts and reactants are in different phases.

Question 8

Where are catalytic converters located and why?

Answer 8

Beside the engine as the catalytic converters work best at high temperatures.

Question 9

What do catalytic converters reduce?

Answer 9

Pollution.
Acid rain.
Photochemical smog.

Question 10

What is a catalytic poison?

Answer 10

Tetraethyl lead.

It blocks the active site and stops it from working.