A. Oxygen
B. Hydrogen
C. Nitrogen
D. Sulfur
A. Nitrogen
B. Carbon
C. Oxygen
D. Hydrogen
A. Pyrite
B. Iron Oxide
C. Calcite
D. None of these
A. Nitrogen Oxide
B. Iron oxide
C. Carbon Oxide
D. Sodium Oxide
A. Hydrogen
B. Helium
C. Nitrogen
D. Neon
A. Ir
B. Fe
C. I
D. Iro
A. Oxygen
B. Hydrogen
C. Carbon dioxide
D. None of these
A. Oxygen
B. Hydrogen
C. Carbon dioxide
D. None of these
A. Oxygen
B. Hydrogen
C. Carbon
D. None of these
A. Hydrogen and Nickel Catalyst
B. Hydrogen and CO2
C. Hydrogen and O2
D. None of these