Chemistry · Hydrocarbons
Hydrocarbons like methane (CH4) burn readily in air. Under sufficient oxygen supply, complete combustion of alkanes results in the formation of carbon dioxide (CO2) and water, with the evolution of large amounts of heat. However, in the case of incomplete combustion, due to limited oxygen, products like carbon monoxide (CO), soot (C), and partially oxidized compounds like formaldehyde and methanol may form. For example, gas fires or poorly ventilated heaters can produce carbon monoxide, a colorless and poisonous gas. Which of the following statements are correct? (A) The product CO is formed during incomplete combustion and is poisonous. (B) The reaction: CH4 + 2O2 → CO2 + 2H2O is an example of incomplete combustion. (C) Complete combustion of C15H32 gives 15 CO2 and 16 H2O. (D) Incomplete combustion always produces carbon dioxide.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(A), (C), and (D)
- 2(A), (B), and (C)
- 3(A) and (C) only✓
- 4(B), (C), and (D)
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(A) and (C) only
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