Atmospheric Structure and Ozone

$CCl _3F(mw)=133.5$
$CCl _2F _2(mw)=121$
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.

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.

D. Ozone

When the CFC refrigerants are leaked from refrigeration or air-conditioning systems, they drift around the lower layers of the atmosphere. Slowly they start infiltrating into the upper layers of the atmosphere and soon reach the ozone rich stratosphere, where they undergo major chemical changes.