Question

Role of CFC present in atmosphere is
a. Reduction in ozone
b. Ozone formation
c. Formation of leghaemoglobin
d. Enhance chlorophyll formation

Answer 1

Hint: Chlorofluorocarbons (CFCs) are the ones that destroy the protective layer on the Earth’s surface which helps to make a shield on earth from harmful ultraviolet rays generated by the sun. CFCs change the global climate and reduce the atmosphere of the earth. They can harm the skin of human beings and release toxic gases that if inhaled by humans can cause severe breathing problems.

Complete answer:
The layer that protects the earth’s atmosphere and is also found in the stratosphere is called the ozone layer. The high ozone content in the ozone layer prevents human beings from living on earth to directly interact with the harmful ultraviolet (UV) rays coming from the sun. It can cause various serious illnesses and damage the cells of the skin.

Chlorofluorocarbons (CFCs) are the main reason due to which depletion of ozone takes place. These compounds have the capability to reach the layer of the stratosphere via winds. In this process, through the process of photodissociation, they release halogen atoms and break ozone into oxygen. Due to this, a hole in the ozone layer formed or reduction of ozone takes place which in turn increases UV rays exposure on earth which negatively impact human life with skin cancer and other illnesses.

Ozone formation is a natural process in the stratosphere which reduces the impact of harmful UV radiation to reach the Earth’s surface.

Leghaemoglobin is the heme protein that is produced from the root nodules of leguminous plants by oxygen-binding.

There are various sources through which enhancement of chlorophyll formation takes place in the body of human beings like including spinach, alfalfa, etc., in the diet.

Hence, the correct answer is option (A).

Note: CFCs are the chemical components that cause the reduction of the protective ozone layer from the earth’s surface. These are non-inflammable chemicals that contain atoms like carbon, chlorine, and fluorine. In almost every refrigerator, air-conditioners, and freezers CFCs are used and the gas release from these appliances is very harmful to human life.