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Ans. The major constituents of the atmosphere are:

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Gases

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Water Vapor

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Dust Particles.

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The pure dry air is composed of five main gases:

\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n

\r\n Gases \r\n	\r\n % \r\n
\r\n Nitrogen \r\n	\r\n 78 \r\n
\r\n Oxygen \r\n	\r\n 21 \r\n
\r\n Argon \r\n	\r\n 0.93 \r\n
\r\n Carbon dioxide \r\n	\r\n 0.03 \r\n
\r\n Helium \r\n	\r\n 0.0005 \r\n
\r\n Hydrogen \r\n	\r\n 0.00005 \r\n
\r\n Ozone \r\n	\r\n 0.000004 \r\n

"}}]]}]

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