7
Question
The earliest atmosphere of the primitive earth contained the following substances:
The earliest atmosphere of the primitive earth contained the following substances:
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Solution
The correct options are
A H2 and CH4
B Water vapour
C NH3
D CH4
As Earth cooled down, atoms of different elements combined together to form molecules. H2, CH4, NH3, CO2 and water vapourwere the earliest molecules formed. These chemicals gradually converted to simple organic molecules that eventually joined together into complex organic molecules like DNA and RNA.
A H2 and CH4
B Water vapour
C NH3
D CH4
As Earth cooled down, atoms of different elements combined together to form molecules. H2, CH4, NH3, CO2 and water vapourwere the earliest molecules formed. These chemicals gradually converted to simple organic molecules that eventually joined together into complex organic molecules like DNA and RNA.
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