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प्रश्न
Draw the structure of the pyran.
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उत्तर
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संबंधित प्रश्न
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Give scientific reasons:
The disaccharide sucrose gives negative Tollens test while the disaccharide maltose gives a positive Tollens test.
Give two evidences for presence of formyl group in glucose.
Draw a neat diagram for the following:
Haworth formula of glucopyranose.
What is the action of the following reagents on glucose?
hydroxylamine
Define carbohydrates.
Write a commercial method for preparation of glucose.
By which of the following process formation of glycosidic bond occurs?
Which of the following type of carbohydrates cannot be hydrolyzed?
From the following identify an example of disaccharides.
Identify the substances having glycosidic bond and peptide bond, respectively in their structure:
Which of the following is the basic unit of carbohydrates?
Which of the following carbohydrate is sweet to taste?
Carbohydrates can contain which of the following chemical groups?
From the following which is a heteropolysaccharide?
From the following identify the materials that are made up of cellulose.
i. Plant cell wall
ii. Exoskeleton of arthropods
iii. Paper from plant pulp
iv. Cotton fibre
Which among the following compounds is obtained when glucose reacts with hydrogen cyanide?
Which is the product obtained, when Br2 water reacts with glucose?
____________ do not give smaller sugar units on hydrolysis.
Prolonged heating of glucose with hot HI results in the formation of ____________.
Which of the following monosaccharide is a ketohexose?
The general formula for polysaccharide is ____________.
Which of the following statements is NOT true for glyceraldehyde?
Which of the following molecules reduces Fehling's solution?
On hydrolysis sucrose gives ____________.
Which among the following sugars does not reduce Tollen's reagent?
Which among the following reagents is used for conversion of glucose to glucoxime?
Which among the following reagents is used to obtain gluconic acid from glucose?
How many moles of acetic acid are obtained in the reaction when one mole glucose is treated with excess acetic anhydride?
\[\ce{Glucose ->[(HCN)] Product ->[(hydrolysis)] Product ->[(HI + Heat)] A}\], the compound A is:
Assertion: A solution of sucrose in water is dextrorotatory. But on hydrolysis in the presence of little hydrochloric acid, it becomes levorotatory.
Reason: Sucrose hydrolysis gives equal amounts of glucose and fructose. As a result of this change in sign of rotation is observed.
The number of sp2 and sp3 hybridised carbon in fructose are respectively ____________.
Complete hydrolysis of cellulose gives ____________.
α-D (+) Glucose and β-D (+) glucose are ____________.
Why carbohydrates are generally optically active?
Starch and cellulose are compounds made up of many units of ______.
Formation of gluconic acid from glucose by oxidation using Br2 water.
Identify the product obtained in the following conversion.
\[\ce{Glucose ->[(O)][Br2 water] Product}\]
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
Describe the action of the following reagent on glucose:
dil. Nitric acid.
Write Fischer projection formulae for glucose.
Why carbohydrates are generally optically active.
Why carbohydrates are generally optically active.
Write the Zwitter ion structure of alanine.
\[\ce{CH2OH - CO - (CHOH)4 - CH2 OH}\] is an example of ______.
Why carbohydrates are generally optically active?
\[\ce{CH2OH - CO - (CHOH)4 - CH2OH}\] is an example of ______.
Why carbohydrates are generally optically active.
The sugar found in milk is ______.
