A) Ozone and oxygen
B) Oxygen and nitrogen
C) Carbondioxide and ozone
D) Argon and ozone
Correct Answer: B
Solution :
The atmosphere is a mixture of gases. It includes nitrogen (78%), oxygen (21%) and other gases (1%) such as carbon dioxide (0.039%), argon (0.93%) and the rest are trace gases. Alone nitrogen and oxygen gases form 99% of the atmosphere.You need to login to perform this action.
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