A.helium and hydrogen
B.oxygen and nitrogen
C.helium and carbon dioxide
D.oxygen and hydrogen
Related Mcqs:
- Biogas is composed of __________?
- The most abundant gas emitted from volcanoes is __________?
- The most abundant gases in the earth’s atmosphere by volume are ____________.
- The earth’s first atmosphere was composed primarily of ______________.
- In a volume of air near the earth’s surface, _____________ occupies 78 percent and ____________ nearly 21 percent.
- Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the earth’s atmosphere?
- Which of the following gases is not found free in air?
- If naked pea seeds were kept in four respiratory flasks, they would germinate best if flask contains:
- Which are the four most abundant elements in living cells ??
- Arrange the following in ascending order of their occurrence in the atmosphere: (1) oxygen (2) Nitrogen (3) Carbon dioxide (4) Argon
