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Multiple Choice
Which of the following substances is capable of igniting and burning under normal conditions?
A
CO2 (carbon dioxide)
B
H2O (water)
C
C2H5OH (ethanol)
D
NaCl (sodium chloride)
Verified step by step guidance
1
Understand the concept of flammability: A substance that can ignite and burn under normal conditions is considered flammable. This means it can react with oxygen in the air to produce combustion.
Analyze each substance's chemical properties: Carbon dioxide (CO2) and water (H2O) are both combustion products and are not flammable; they actually act as fire suppressants.
Consider sodium chloride (NaCl): It is an ionic solid (table salt) and does not burn or ignite under normal conditions because it is very stable and does not react with oxygen.
Examine ethanol (C2H5OH): Ethanol is an organic compound with carbon and hydrogen atoms bonded to oxygen, making it a fuel that can easily react with oxygen to ignite and burn.
Conclude that among the given substances, ethanol (C2H5OH) is capable of igniting and burning under normal conditions due to its chemical structure and flammability.