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Hot concentrated HNO3 converts graphite into :
- a)Graphite oxide
- b)Benzene hexacarboxylic acid
- c)Both (A) and (B)
- d)None
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Hot concentrated HNO3 converts graphite into :a)Graphite oxideb)Benzen...
Explanation:
When hot concentrated HNO3 is used to treat graphite, it results in the formation of Benzene hexacarboxylic acid. This process is known as oxidation of graphite.
The reaction :
C + 6HNO3 → C6H(NO3)6 + 6NO2 + 2H2O
Here, concentrated nitric acid acts as an oxidizing agent. During the reaction, the carbon atoms present in graphite are oxidized to form carboxylic acid groups. These carboxylic acid groups are attached to the hexagonal rings of benzene. Hence, the product obtained is benzene hexacarboxylic acid.
Why not Graphite oxide?
Graphite oxide is formed when graphite is treated with a mixture of concentrated sulfuric acid and nitric acid. This reaction is known as the Hummers method. The main difference between the oxidation of graphite using hot concentrated HNO3 and the Hummers method is the absence of sulfuric acid in the former. Therefore, the product obtained is different.
Applications:
Benzene hexacarboxylic acid has various applications in the field of materials science and organic chemistry. It is used as a precursor for the synthesis of various organic compounds such as polyamides, polyesters, and polyurethanes. It is also used as a cross-linking agent for epoxy resins and as a flame retardant for plastics.
When hot concentrated HNO3 is used to treat graphite, it results in the formation of Benzene hexacarboxylic acid. This process is known as oxidation of graphite.
The reaction :
C + 6HNO3 → C6H(NO3)6 + 6NO2 + 2H2O
Here, concentrated nitric acid acts as an oxidizing agent. During the reaction, the carbon atoms present in graphite are oxidized to form carboxylic acid groups. These carboxylic acid groups are attached to the hexagonal rings of benzene. Hence, the product obtained is benzene hexacarboxylic acid.
Why not Graphite oxide?
Graphite oxide is formed when graphite is treated with a mixture of concentrated sulfuric acid and nitric acid. This reaction is known as the Hummers method. The main difference between the oxidation of graphite using hot concentrated HNO3 and the Hummers method is the absence of sulfuric acid in the former. Therefore, the product obtained is different.
Applications:
Benzene hexacarboxylic acid has various applications in the field of materials science and organic chemistry. It is used as a precursor for the synthesis of various organic compounds such as polyamides, polyesters, and polyurethanes. It is also used as a cross-linking agent for epoxy resins and as a flame retardant for plastics.
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Community Answer
Hot concentrated HNO3 converts graphite into :a)Graphite oxideb)Benzen...
Nitric acid works as an oxidising agent for graphite, cold nitric acid does not react with graphite. Hot nitric acid gives benzene hexacarboxylic acid.
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Hot concentrated HNO3 converts graphite into :a)Graphite oxideb)Benzene hexacarboxylic acidc)Both (A) and (B)d)NoneCorrect answer is option 'B'. Can you explain this answer?
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