Atmospheric Structure and Ozone

The ozone layer in the stratosphere is created by the interaction of the UV radiation from the sun and the oxygen. It is capable of absorbing the most damaging type of UV radiation called the UV-B. The ozone hole refers to the depletion of the ozone by the pollutants like CFCs, HCFCs and HFCs. The pollutants split up due to UV radiation and the nascent chlorine reacts with the ozone molecules to form the oxygen. Over Antarctica, the ozone is highly depleted and so the widest ozone hole is seen there. This is because of the presence of the stratospheric cloud in abundance.

$CCl _3F(mw)=133.5$
$CCl _2F _2(mw)=121$
By given data first we calculate density of solution
$\dfrac {P}{S}=\dfrac {RT}{Mw}\quad R=0.08\quad T=200$
$P=0.08$
for $CCl _3F-S(CCl _3F)=\dfrac {0.08\times 133.5}{0.08\times 200}$
$S=0.6875$
for $CCl _2F _2=\dfrac {0.08\times 121}{0.08\times 200}$
$=0.605$
given data in $(PPt)$
$10^{12}\ gm$ solution contains $=175\ gm$
$10^{3}\ gm$ solution contains $=\dfrac {275}{10^{12}}\times 10^3$
Mass $=275\times 10^{-9}\ gm$
find the volume $d=\dfrac {M}{v}$
$v=\dfrac {1000}{0.6785}=1454.5$
Molarity of $CCl _3F=\dfrac {275\times 10^{-9}}{137.5\times 1454.5}$
$=1.37\times 10^{-12}$
Similarly for $CCl _2F _2$
$10^{12}\ gm$ solution certain $=605$
$10^{3}\ gm$ solution certain $=\dfrac {605}{10^{12}}\times 10^3$
Mass $=605\times 10^{-9}$
$d=\dfrac {m}{v}\quad v=\dfrac {m}{v}=\dfrac {1000}{605}$
$v=1652.89$
molarity $=\dfrac {605\times 10^{-9}}{121\times 1652.89}$
$M=3.02\times 10^{-12}\ mol\ l^3$

EESC stands for Equivalent Effective Stratospheric Chlorine, a metric used to estimate the potential for ozone depletion in the stratosphere.

The atmosphere is a gaseous envelope surrounding the earth. It is mostly composed of nitrogen, oxygen, argon, carbon dioxide and some other gasses in trace amounts. The atmosphere is held in place by gravity of the earth.    Thus the correct answer is option D.

The Earth's primordial atmosphere was formed from the gases present in the solar nebula, which were primarily hydrogen and helium. These light gases were eventually lost to space due to the Earth's low gravity and solar wind.

Greenhouse gases like carbon dioxide (CO2), water vapor, and nitrous oxide (N2O) are key elements in the atmosphere that alter the Earth's energy balance by trapping infrared radiation.

Ozone is present throughout the lower atmosphere (troposphere and stratosphere). Most ozone resides in the stratospheric “ozone layer” above Earth's surface.

The layer of the earth's atmosphere which contains a high concentration of ions and free electrons and is able to reflect radio wave is known as the ionosphere.

The normal movement of electric charges among the Earth's surface, the various layers of atmosphere and especially the ionosphere, taken together are known as Global atmosphere electric circuit.

Ozone is a protective blanket that is present in the stratosphere which protects earth from harmful effects of UV radiations that are present in sunlight.

Chlorofluorocarbons and other halogenated compounds cause ozone depletion.

Ozone is a protective blanket that is present in stratosphere which protects Earth from harmful effects of UV radiations that are present in sun light.

Ozone holes are formed in Antarctica and these are due to special clouds that form in the stratosphere called polar stratospheric clouds. Clouds usually do not form in stratosphere, this can happen only at such low temperatures. These clouds accumulate pollutants resulting in formation of ozone holes. 

• Stratosphere is the region of atmosphere where ozone layer is present, hence ozone depletion occurs in stratosphere.
  
• Biosphere is the region of surface and atmosphere of earth occupied by living organisms, hence unrelated to the question.
• Atmosphere is a broad term which becomes irrelevant when already a specific option ie stratosphere, is given in the choices.
• Microsphere is a small particle which has a different environment than its surroundings, hence incorrect.

Secondary,

Methane and Nitrous oxide.

Chlorofluorocarbons (CFCs) are synthetic chemicals that, when released into the atmosphere, break down and deplete the ozone layer.