3.3.3 Halogenoalkanes PPQ

Question 1

Give one reason why carbon dioxide absorbs infrared radiation.

Answer 1

C=O bonds vibrate at IR frequency / C=O bonds are polar

Question 2

State what is meant by the term carbon-neutral

Answer 2

no net emissions of carbon dioxide to the atmosphere

Question 3

Most scientists believe that ozone in the upper atmosphere should not be allowed to become depleted. Which is a valid reason for this belief? A. Ozone absorbs UV radiation. B. Ozone helps to prevent global warming. C. Ozone helps to remove pollutants such as chloroalkanes. D. Ozone is an efficient disinfectant.

Answer 3

A. Ozone absorbs UV radiation

Question 4

Suggest why ethanol produced in Europe using silverskin from South America is less likely to be carbon neutral than ethanol produced from crops grown in europe.

Answer 4

the silverskin has to be transported from south america to europe, which causes co2 emissions