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Which of the following reactions of glucose can be explained only by its cyclic structure?
  • a)
    Glucose forms pentaacetate.
  • b)
    Glucose reacts with hydroxylamine to form an oxime.
  • c)
    Pentaacetate of glucose does not react with hydroxylamine.
  • d)
    Glucose is oxidised by nitric acid to gluconic acid.
Correct answer is option 'C'. Can you explain this answer?
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Which of the following reactions of glucose can be explained only by i...
The pentaacetate of glucose does not react with hydroxylamine. This indicates that the aldehyde in glucose is not free and is involved in the formation of cyclic structure. Hence, this reaction of glucose can only be explained by its cyclic structure. Thus, option (iii) is correct.
Option (i) is incorrect because the capability of glucose to form pentaacetate tells us about the 5 hydroxyl group of the glucose.
Option (ii) is incorrect because this reaction confirms the presence of a carbonyl group in glucose.
Option (iv) is incorrect because this reaction indicates the presence of a primary alcohol in the glucose.
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Which of the following reactions of glucose can be explained only by i...
Explanation:

Cyclic structure of glucose:
Glucose has a cyclic structure due to the formation of hemiacetal linkage between the carbonyl group of the aldehyde form and the hydroxyl group present in the fifth carbon atom. This cyclic structure is also known as pyranose form.

Reaction of glucose with hydroxylamine:
Glucose reacts with hydroxylamine to form an oxime, which is a characteristic reaction of aldehydes and ketones. This reaction occurs due to the presence of the carbonyl group in glucose.

Glucose forms pentaacetate:
Glucose can form pentaacetate by reacting with acetic anhydride in the presence of an acid catalyst. This reaction occurs due to the presence of multiple hydroxyl groups in glucose, which can be acetylated.

Glucose is oxidized by nitric acid:
Glucose can be oxidized by nitric acid to form gluconic acid. This reaction occurs due to the presence of the aldehyde group in glucose, which can be oxidized to a carboxylic acid group.

Pentaacetate of glucose does not react with hydroxylamine:
The pentaacetate form of glucose does not react with hydroxylamine to form an oxime. This is because the acetylation of the hydroxyl groups in glucose prevents the reaction with hydroxylamine. The acetyl groups act as protecting groups, which block the hydroxyl groups and prevent them from reacting with other compounds. Therefore, the pentaacetate form of glucose cannot undergo the characteristic reaction of aldehydes and ketones with hydroxylamine to form an oxime.
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Which of the following reactions of glucose can be explained only by its cyclic structure?a)Glucose forms pentaacetate.b)Glucose reacts with hydroxylamine to form an oxime.c)Pentaacetate of glucose does not react with hydroxylamine.d)Glucose is oxidised by nitric acid to gluconic acid.Correct answer is option 'C'. Can you explain this answer?
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Which of the following reactions of glucose can be explained only by its cyclic structure?a)Glucose forms pentaacetate.b)Glucose reacts with hydroxylamine to form an oxime.c)Pentaacetate of glucose does not react with hydroxylamine.d)Glucose is oxidised by nitric acid to gluconic acid.Correct answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following reactions of glucose can be explained only by its cyclic structure?a)Glucose forms pentaacetate.b)Glucose reacts with hydroxylamine to form an oxime.c)Pentaacetate of glucose does not react with hydroxylamine.d)Glucose is oxidised by nitric acid to gluconic acid.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following reactions of glucose can be explained only by its cyclic structure?a)Glucose forms pentaacetate.b)Glucose reacts with hydroxylamine to form an oxime.c)Pentaacetate of glucose does not react with hydroxylamine.d)Glucose is oxidised by nitric acid to gluconic acid.Correct answer is option 'C'. Can you explain this answer?.
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