Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production. c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone.

b. The chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production.

Explanation:

The chlorofluorocarbons are the chemicals which are liberated into the atmosphere by the human activities. This is used as gas in refrigerators and air conditioners. Ozone layer is a protective layer which is present in the stratospheric layer of the atmosphere. It shields the atmosphere from the incident UV-B and infrared radiations coming from the sun. These radiations can cause harm to the living beings.

The halides like chlorides and fluorides reacts with the oxygen atoms in the ozone layer causes the depletion of the ozone layer. These chemicals even if available in small quantities can cause harm to the ozone layer.

On the basis of the above explanation, b. The chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production. is the correct option.

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.