What is responsible for causing a hole in ozone layer?

What is responsible for causing a hole in ozone layer?

The release of a large number of CFCs or chlorofluorocarbons and BFCs or bromofluorocarbons by industries are responsible for the formation of holes in the ozone layer.

What gas attacks the ozone?

CFCs rise and gradually accumulate in the stratosphere where they are broken down by the sun’s ultraviolet light, so releasing chlorine atoms. The chlorine attacks the ozone, one chlorine atom can help to destroy 100,000 ozone molecules.

Which gas is responsible for ozone layer depletion around Earth Mcq?

The correct answer is Chlorofluorocarbons. Chlorofluorocarbons(CFC) are responsible for ozone layer depletion. Ozone gas is continuously formed by the action of UV rays on molecular oxygen and also degraded into molecular oxygen in the stratosphere.

What caused the hole in the ozone layer over Australia?

As sun-loving Australians, we’re all too familiar with the damage UV can cause. During the 1980s, scientists discovered that key ODSs known as chlorofluorocarbons (CFCs) caused significant damage to the ozone layer. This resulted in the so-called ‘hole in the ozone layer’.

What is ozone gas?

Ozone (O3) is a highly reactive gas composed of three oxygen atoms. It is both a natural and a man-made product that occurs in the Earth’s upper atmosphere. (the stratosphere) and lower atmosphere (the troposphere).

What is ozone hole Mcq?

The ozone hole means thinning of the ozone layer rather than a hole in the ozone layer. The ozone layer is becoming thinner day by day due to a chemical called chlorofluorocarbons (CFCs). Due to the hole in the ozone layer, the UV light can enter the surface of Earth. Hence, the correct choice is option D.

Which gas does not deplete ozone layer?

HFCs
HFCs are emitted as by-products of industrial processes and are also used in manufacturing. They do not significantly deplete the stratospheric ozone layer, but they are powerful greenhouse gases with global warming potentials ranging from 140 (HFC-152a) to 11,700 (HFC-23).

What is ozone hole?

The term ‘ozone hole’ refers to the depletion of the protective ozone layer in the upper atmosphere (stratosphere) over Earth’s polar regions. Polar stratospheric clouds create the conditions for drastic ozone destruction, providing a surface for chlorine to change into ozone-destroying form.

Is there Hole in ozone layer?

What we call the ozone hole is a thinning of the protective ozone layer in the stratosphere (the upper layer of Earth’s atmosphere) above Antarctica that begins every September. The chemical reactions then begin to destroy the ozone layer as the sun rises in the Antarctic at the end of winter.

Which gases damage the ozone layer Mcq?

Ozone Layer Depletion MCQ Question 2 Detailed Solution The correct answer is Chlorofluorocarbons. Chlorofluorocarbons(CFC) are responsible for ozone layer depletion.

Which gas is responsible for the global warming?

Carbon dioxide
Global Warming Potential (100-year): 1 Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities. In 2019, CO2 accounted for about 80 percent of all U.S. greenhouse gas emissions from human activities.

Which of the following gases can deplete the ozone layer in the upper atmosphere?

As explained above, the primary cause of ozone depletion is the presence of chlorine-containing source gases (primarily CFCs and related halocarbons). In the presence of UV light, these gases dissociate, releasing chlorine atoms, which then go on to catalyze ozone destruction.