Chemistry
Grade-8
Easy
Question
Carbon monoxide combines with blood's hemoglobin to form a compound called as _____
- Carboxyglobin
- Carbonyl
- Carbonyl hemoglobin
- Carboxyhemoglobin
Hint:
It binds hemoglobin making it toxic and reducing it's oxygen carrying capacity.
The correct answer is: Carboxyhemoglobin
The correct option is d)Carboxyhemoglobin.
- Carboxyhemoglobin is a complex formed within red blood cells when hemoglobin is exposed to carbon monoxide and then binds to hemoglobin with a 200-fold affinity. Carbon monoxide (CO) is a colorless, odorless, tasteless gas.
- It is a byproduct of incomplete combustion of hydrocarbons (fossil fuels) and makes up less than 0.001% of the atmosphere.
- It binds to hemoglobin with much higher affinity than oxygen to form carboxyhemoglobin, reducing its oxygen-carrying capacity and oxygen utilization.
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In the laboratory preparation of carbon monoxide, hydrochloric acid is only used although sulfuric acid reacts with calcium carbonate in the same way as HCl. However, the sulfuric acid is never used because:
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(iii). The reaction is a highly exothermic reaction
(iv). To react both of the reactants, many temperature conditions need to be fulfilled
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