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प्रश्न
Define carbohydrates.
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उत्तर
Carbohydrates are optically active polyhydroxy aldehydes or polyhydroxy ketones or compounds that can be hydrolysed to polyhydroxy aldehydes or polyhydroxy ketones.
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संबंधित प्रश्न
\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Give two evidences for presence of formyl group in glucose.
Explain the classification of carbohydrates with examples.
What is the action of the following reagents on glucose?
acetic anhydride
Write a chemical reaction to convert glucose into glucose cyanohydrin.
From the following which is a heteropolysaccharide?
______ is the prosthetic group of glycoproteins.
Fructose is the fruit sugar and chemically it is ketohexose but it has a ______ rather than a ______.
Identify the WRONG statement.
____________ do not give smaller sugar units on hydrolysis.
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 |
4-O-(α-D-Glucopyranosyl)-D-glucopyranose is ____________.
Which one of the following is generally applicable to polysaccharides?
Glucose and gluconic acid treated with dilute nitric acid forms saccharic acid. What does this indicate?
Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?
How many moles of fructose and galactose respectively are obtained on hydrolysis of 1 mole stachyose?
Identify the number of secondary carbon atoms in glucose.
Which among the following reagents is used for conversion of glucose to glucoxime?
How many optical isomers are possible for a compound having four asymmetric carbon atoms?
Which one of the following rotates the plane polarized light towards left?
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.
Which of the following are epimers?
The molecule of glucose is also called ______.
Which carbon atoms of fructose are bonded together through oxygen forming fructofuranose?
Corn is immersed in boiling water. It is then cooled, and the solution becomes sweet. It is due to ______.
Why carbohydrates are generally optically active?
Explain the hydrolysis of sucrose.
Write the Zwitter ion structure of alanine.
Why carbohydrates are generally optically active?
