What is the chemical reaction that causes the formation of stratospheric ozone?

Stratospheric ozone is formed naturally through the interaction of solar ultraviolet (UV) radiation with molecular oxygen (O2). The "ozone layer," approximately 6 through 30 miles above the Earth's surface, reduces the amount of harmful UV radiation reaching the Earth's surface.

What is the chemical reaction that causes the breakdown of stratospheric ozone?

When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules. One chlorine atom can destroy over 100,000 ozone molecules before it is removed from the stratosphere.

What is the chemical equation for ozone formation?

Each oxygen atom then quickly combines with an oxygen molecule to form an ozone molecule: O + O₂ → O.

What chemical reactions happen in the ozone layer?

Chlorine and bromine catalytic reactions are but one group of ozone destruction reactions. Reactive hydrogen and reactive nitrogen gases, for example, are involved in other cat- alytic ozone-destruction cycles that also occur in the strato- sphere.

What chemical reactions are occurring in the stratosphere?

In the stratosphere, ultraviolet light reacts with O ₂ molecules to form atomic oxygen. Atomic oxygen then reacts with an O ₂ molecule to produce ozone (O ₃). As a result of this reaction, the stratosphere contains an appreciable concentration of ozone molecules that constitutes the ozone layer.

Stratospheric Ozone

What are the chemical reactions taking place in atmosphere?

Note: Carbon dioxide is formed in the troposphere, formation of ozone takes place in the stratosphere, chlorofluorocarbons are also formed in this layer along with other reactions of chlorine. In the mesosphere and thermosphere reaction of ions like nitrogen oxide, helium, oxygen takes place.

How is ozone formed in the upper atmosphere Why is the damage of ozone layer a cause of concern to us state a cause of this damage?

Ozone is formed in upper atmosphere by the reaction of ultraviolet UV radiations on oxygen O2 molecule. The damage to ozone layer is a cause of concern to us as due to its damage more ultraviolet rays reach the earth's surface causing various health hazards.

What is the chemical equation of ozone formation quizlet?

Ozone is formed in the stratosphere by the reaction of ultraviolet radiation striking an oxygen molecule. This results in the oxygen molecule splitting apart and forming atomic oxygen (O2 + hv = O + O). Atomic oxygen can now react with molecular oxygen to form ozone (O+O2 = O3).

How is ozone produced and destroyed in the stratosphere?

Ozone is created when the kind of oxygen we breathe—O₂—is split apart by sunlight into single oxygen atoms. Single oxygen atoms can re-join to make O₂, or they can join with O₂ molecules to make ozone (O₃). Ozone is destroyed when it reacts with molecules containing nitrogen, hydrogen, chlorine, or bromine.

What is the chemical equation for ozone depletion?

ClO + O = Cl + O2

The ozone depletion is also referred to as the “ozone hole”, due to the fact that its reduction is not uniform, but mainly concentrated in the Antarctic region, with reductions up to 70 per cent.

What is photochemical reaction in chemistry?

photochemical reaction, a chemical reaction initiated by the absorption of energy in the form of light. The consequence of molecules' absorbing light is the creation of transient excited states whose chemical and physical properties differ greatly from the original molecules.

Where is the stratospheric ozone?

90% of the planet's ozone is in the "ozone layer" which exists in the lower level (20-25 kilometres above sea level) of the stratosphere. The stratosphere is the region of the atmosphere which exists between 10 and 50 kilometres above the surface of the earth.

How ozone is formed in the troposphere?

Tropospheric ozone is formed by the interaction of sunlight, particularly ultraviolet light, with hydrocarbons and nitrogen oxides, which are emitted by automobile tailpipes and smokestacks.

How do CFCs cause ozone depletion quizlet?

How do CFCs cause ozone depletion? Ultraviolet radiation breaks down CFCs, molecules containing chlorine. Chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.

How is ozone layer formed in the atmosphere What is the function of this layer Class 10?

Ozone at the higher levels of the atmosphere is a product of UV radiation acting on oxygen (O2) molecule. The higher energy UV radiations split apart some molecular oxygen (O2) into free oxygen (O) atoms. These atoms then combine with the molecular oxygen to form ozone as shown.

How is ozone formed in the stratosphere Class 11?

Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere. In the first step, solar ultraviolet radiation breaks apart one oxygen molecule (O2) to produce two oxygen atoms (2 O) (see Figure Q2-1).

Which action takes place in the formation of ozone?

Which of the following action takes place in the formation of ozone? Explanation: Ozone is made by the action of daylight on oxygen. It forms a layer 20 to 50 km over the surface of the earth. This action of formation of ozone over the surface of the earth takes place naturally within the atmosphere.

What type of chemical and photochemical reactions occur in the atmosphere?

In the atmosphere, there are numerous photochemical reactions taking place all the time. Some of the famous examples include the formation of ozone in the atmosphere, photochemical smog, etc. There are many gases present in the atmosphere like oxygen, carbon dioxide, nitrogen, aerosols, etc.

Why Photochemical smog is called so?

'Photochemical smog' is so-called because it is formed as a result of a photochemical reaction (i.e. in presence of sunlight) between oxides of nitrogen and hydrocarbons.

What chemical species in the stratosphere is essential for life on earth?

Ozone is formed naturally and photochemically within the stratosphere. Ozone is considered a pollutant in the troposphere, but in the stratosphere it is essential to life on earth because it absorbs biologically harmful UV radiation.

How does nitrogen dioxide form ozone?

However in the troposphere, nitrogen dioxide, not molecular oxygen, provides the primary source of the oxygen atoms required for ozone formation. Sunlight splits nitrogen dioxide into nitric oxide and an oxygen atom. A single oxygen atom then combines with an oxygen molecule to produce ozone.

What is the difference between stratospheric and tropospheric ozone?

Unlike stratospheric ozone, which forms naturally in the upper atmosphere and protects us from the sun's harmful ultraviolet rays, ground-level (or tropospheric) ozone is created through the interactions of man-made (and natural) emissions of volatile organic compounds and nitrogen oxides in the presence of heat and ...

How is ozone formed in stratosphere 10?

Complete answer: Ozone is formed in the stratosphere naturally by solar ultraviolet radiations (UV) and oxygen molecules. It makes up about 21% of our atmosphere. These reactions take place continuously whenever solar radiation is falling on them due to which the largest amount of ozone is formed in this layer itself.

How is ozone layer formed what is the reason for the depletion of this layer What is the effect of ozone layer depletion?

Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. It is destroyed more quickly than it is created.

What is the chemical reaction of photochemical smog?

Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.