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प्रश्न
Assertion: D (+) – Glucose is dextrorotatory in nature.
Reason: ‘D’ represents its dextrorotatory nature.
विकल्प
Assertion and reason both are correct statements and reason explains the assertion.
Both assertion and reason are wrong statements.
Assertion is correct statement and reason is wrong statement.
Assertion is wrong statement and reason is correct statement.
Assertion and reason both are correct statements but reason does not explain assertion.
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उत्तर
Assertion is correct statement and reason is wrong. statement.
Explanation:
Glucose is correctly named as D(+)-glucose. ‘D’ before the name of glucose represents the configuration whereas ‘(+)’ represents dextrorotatory nature of the molecule. The letters ‘D’ or ‘L’ before the name of any compound indicate the relative configuration of a particular stereoisomer.
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संबंधित प्रश्न
Write the reaction that indicates the presence of -CHO group in glucose
What do you observe when glucose solution is heated with Tollen’s reagent?
Write the reaction involved when D-glucose is treated with the following reagent:
(CH3CO)2O
The following compound can be called as:
What is the most abundant organic compound on earth?
Which of the following statements is incorrect regarding glucose?
The symbols D and L represents ____________.
Glucose reacts with acetic anhydride to form ______.
Which of the following reactions of glucose can be explained only by its cyclic structure?
The number of chiral carbon atoms present in cyclic structure α-D(+) glucose:
The two forms of D-glucopyranose obtained from the solution of D-glucose are called ____________.
Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6?
| (I) |  |
| (II) |  |
| (III) |  |
How will you distinguish 1° and 2° hydroxyl groups present in glucose? Explain with reactions.
What happens when D-glucose is treated with the following reagent?
HI
Account for the following:
What happens when D – glucose is treated with the following reagents
HNO3
Glucose with excess of phenyl hydrazine forms ______.
Match List - I with List - II.
| List I | List II | ||
| (A) | Glucose + HI | (I) | Gluconic acid |
| (B) | Glucose + Br2 water | (II) | Glucose pentacetate |
| (C) | Glucose + acetic anhydride | (III) | Saccharic acid |
| (D) | Glucose + HNO3 | (IV) | Hexane |
Choose the correct answer from the options given below:
When D-glucose reacts with HI, it forms ______.
Give a reason for the following observations:
Penta-acetate of glucose does not react with hydroxylamine.
