Study of two methane combustions
M.C.Q.: Choose the correct answer(s)

• 1. The flame is yellow when methane combustion is:
• complete incomplete

• 2. The collar is open when methane combustion is:
• complete incomplete

• 3. Carbon monoxide is a deadly gas that forms when methane combustion is:
• complete incomplete

• 4. The chemical substance that enters and leaves the flame created by methane combustion is:
• methane dioxygen dinitrogen

• 5. The reactants of methane combustion are:
• water dinitrogen dioxygen carbon dioxide carbon methane carbon monoxide

• 6. The products of complete methane combustion are:
• water dinitrogen dioxygen carbon dioxide carbon methane carbon monoxide

• 7. The products of incomplete methane combustion are:
• water dinitrogen dioxygen carbon dioxide carbon methane carbon monoxide

• 8. The following diagram represents the chemical test for:
• water dioxygen carbon dioxide carbon

• 9. The following test shows that:
• the lighter contains carbon dioxide the lighter does not contain carbon dioxide butane does not turn limewater cloudy
• Remark:
  Butane and carbon dioxide are denser than air.
  ρ_Air = 1.2 g/L
  ρ_Butane = 2.3 g/L
  ρ_{Carbon dioxide} = 1.8 g/L

• 10. The following test shows that:
• the lighter contains carbon when butane burns, carbon dioxide is formed when butane burns, carbon is formed

📊 RESULT: