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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
Maltose is a
(a) Polysaccharide
(b) Disaccharide
(c) Trisaccharide
(d) Monosaccharide
What do you observe when glucose is treated with bromine water?
Choose the appropriate answer(s) for the below representation from the options given
The number of asymmetric carbon atom(s) below the figure is/are
Which of the following statements is incorrect regarding glucose?
Glucose reacts with acetic anhydride to form ______.
Which of the following properties of glucose cannot be explained by its open chain structure?
(i) Glucose does not form hydrogen sulphite with NaHSO3.
(ii) On oxidation with HNO3 glucose gives saccharic acid.
(iii) Glucose is found to exist in two different crystalline forms which are named as α and β.
Which is the least stable form of glucose?
The α-D glucose and β-D glucose differ from each other due to difference in carbon atom with respect to its ____________.
The two forms of D-glucopyranose obtained from the solution of D-glucose are called ____________.
Choose the correct relationship for glucose and fructose:
Which of the following pairs represents anomers?
How will you distinguish 1° and 2° hydroxyl groups present in glucose? Explain with reactions.
On the basis of which evidences D-glucose was assigned the following structure?
\[\begin{array}{cc}
\ce{CHO}\\
|\phantom{....}\\
\phantom{..}\ce{(CHOH)4}\\
|\phantom{....}\\
\phantom{..}\ce{CH2OH}
\end{array}\]
Account for the following:
What happens when D – glucose is treated with the following reagents
Bromine water
The number of asymmetric carbon atoms in the glucose molecule in open and cyclic form is ______.
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:
