Carbon monoxide (CO) is a simple molecule composed of one carbon atom and one oxygen atom, connected by a triple bond (one sigma and two pi bonds). It is a neutral, non-polar gas that is highly toxic because of its... Read More
Carbon monoxide (CO) is a simple molecule composed of one carbon atom and one oxygen atom, connected by a triple bond (one sigma and two pi bonds). It is a neutral, non-polar gas that is highly toxic because of its ability to bind with hemoglobin, forming carboxyhemoglobin (COHb). This binding is about 200 times stronger than oxygen, which prevents red blood cells from carrying oxygen efficiently, leading to oxygen deprivation and poisoning.
The other options are incorrect for the following reasons:
A) It combines with H₂O to form carbonic acid: This is incorrect. Carbon dioxide (CO₂), not CO, reacts with water to form carbonic acid (H₂CO₃). CO does not readily react with water.
C) It is a powerful oxidizing agent: CO is actually a reducing agent, not an oxidizing agent. It can reduce metal oxides in processes like metallurgy.
D) It is used to prepare aerated drinks: This is incorrect because CO₂, not CO, is used to carbonate beverages. CO is toxic and not suitable for food or drink applications.
Key properties of CO:
Colorless, odorless, and tasteless gas.
Slightly soluble in water but chemically stable.
Acts as a reducing agent in chemical reactions.
Forms strong complexes with metals, especially iron in hemoglobin.
In summary, the correct statement about carbon monoxide is that it reacts with hemoglobin in red blood cells, causing severe health hazards and making it a dangerous pollutant.
Correct Answer: B) It reacts with the hemoglobin in red blood cells
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