1-Approximately how many ozone molecules can one chlorine atom derived from one

Question

1-Approximately how many ozone molecules can one chlorine atom derived from one CFC molecule react with?

1

100

1000

100000

2-Which molecule absorbs UV-B radiation?

O2

O3

CO2

NO2

3-Chlorofluorocarbons, such as CCl2F2, can cause problems in the upper atmosphere by destroying

nitrogen oxides

oxygen

ozone

D

.

polynuclear hydrocarbons

4-What continent is the ozone hole located over?

Africa

Antarctica

Asia

North America

5-Ozone-depleting substances typically contain this element

oxygen

sulfur

nitrogen

chlorine

1

100

1000

100000

Explanation / Answer

1) one single chlorine derived form a CFC molecule can destroy 100000 ozone molecules. (d)

2) the ozone absorbs mainly UV-B radiation, that is its natural function as protector of life in earth. (b)

3) (c) precisely chlorofluorocarbons destroy ozone molecules.

4) It is located over Antartica, the south pole of earth (b)

5)chlorine (d) that's why receive the name of chlorofluorocarbons

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