Question

Describe how ozone layer is formed ? For 5 mark

Answer 1

Ozone is a gas that is naturally present in our atmosphere. Ozone has the chemical formula O3 because an ozone molecule contains three oxygen atoms . Ozone was discovered in laboratory experiments in the mid- 1800s. Ozone�fs presence in the atmosphere was later discovered using chemical and optical measurement methods. The word ozone is derived from the Greek word oζειν (ozein),, meaning to smell. Ozone has a pungent odor that allows it to be detected even at very low amounts. Ozone reacts rapidly with many chemical compounds and is explosive in concentrated amounts. Electrical discharges are generally used to produce ozone for industrial processes such as air and water purification and bleaching of textiles and food products.

Answer 2

Answer:

Formation of the ozone layer-

(a) During the origin of life Earth, some of underwater micro-organisms were to photosynthesize due to molecular oxygen (O2) was released in atmosphere.

(b) This oxygen is released to stratosphere where it began to react with ultraviolet radiations from sun to form free oxygen (O).