Advertisements
Advertisements
प्रश्न
What are reducing and non-reducing sugars?
Advertisements
उत्तर
1. Reducing sugars: Those carbohydrates which contain free aldehyde or ketonic group and reduces Fehling’s solution and Tollen’s reagent are called reducing sugars. All monosaccharides whether aldose or ketone are reducing sugars.
2. Non-reducing sugars: Carbohydrates that do not reduce Tollen’s reagent and Fehling’s solution are called non – reducing sugars. Example Sucrose. They do not have a free aldehyde group.
APPEARS IN
संबंधित प्रश्न
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Draw the structure of α-D glucopyranose.
Explain the preparation of glucose from sucrose.
Draw the Haworth projection structure of the following.
α-D-(–)-Fructofuranose
Explain D and L configuration in sugars.
What is monosaccharide?
Draw the structure of the pyran.
Fructose is the fruit sugar and chemically it is ketohexose but it has a ______ rather than a ______.
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?
Match the Column I and Column II select the correct option.
| Column I | Column II | ||
| i. | Monosaccharides | a. | Stored energy in animals |
| ii. | Glycogen | b. | Polymer made from ß-glucose molecules |
| iii. | Cellulose | c. | Exoskeleton of arthropods |
| iv. | Chitin | d. | Building blocks of carbohydrates |
| e. | Plant hormone |
Match the columns and select the correct option.
| Column I | Column II | ||
| i. | Starch | a. | Animal storage molecule |
| ii. | Cellulose | b. | Plant storage molecule |
| iii. | Glycogen | c. | Heparin |
| iv. | Heteropolysaccharide | d. | Plant cell wall component |
Which among the following type of linkages is present in cellulose?
Prolonged heating of glucose with hot HI results in the formation of ____________.
4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.
Which element among the following is not present in saccharine?
Stachyose is ____________.
Identify the number of secondary carbon atoms in glucose.
Which among the following sugars does not reduce Tollen's reagent?
What is the molecular formula of glyceraldehyde?
Identify the product Y in the following reaction.
\[\ce{Maltose ->[Hydrolysis] X ->[dil. HNO3][(excess)] Y}\]
When one mole of lactose is hydrolysed, the hydrolysate contains ____________.
How many optical isomers are possible for a compound having four asymmetric carbon atoms?
Which one given below is a non-reducing sugar?
\[\ce{Glucose ->[(HCN)] Product ->[(hydrolysis)] Product ->[(HI + Heat)] A}\], the compound A is:
Complete hydrolysis of cellulose gives ____________.
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Starch
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
Sucrose
Which of the following groups contain polysaccharides?
The molecule of glucose is also called ______.
Which one is a non-reducing commercial sugar?
Consider the following reaction
\[\ce{A <-[Br2 - H2O] Glucose ->[HNO3] B}\]
Here, 'A' and 'B' are respectively.
Describe the action of the following reagent on glucose:
Bromine water
Carbohydrates that do not undergo hydrolysis further are called ______.
Write the ring structure of glucose.
CH2 OH - CO - (CHOH)4 - CH2 OH is an example of ______.
Why carbohydrates are generally optically active.
Write the Zwitter ion structure of alanine.
Why carbohydrates are generally optically active.
