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Question

Choose the correct answers from the alternatives given .
The primitive Earths atmosphere contained gases produced by

A
outgassing by the Earths interior
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B
gravitational energy
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C
radioactivity
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D
all of these
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Solution

The correct option is A outgassing by the Earths interior
After the loss of the hydrogen, helium and other hydrogen-containing gases from early Earth due to the Sun's radiation, primitive Earth was devoid of an atmosphere. The first atmosphere was formed by outgassing gases trapped in the interior of the early Earth.
So, the correct option is 'outgassing by the Earth interior'

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