Organic Chemistry-Package(Custom)
4th Edition
ISBN: 9781259141089
Author: SMITH
Publisher: MCG
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Question
Chapter 28, Problem 28.21P
Interpretation Introduction
(a)
Interpretation: The given compound is to be classified as reducing or nonreducing sugar.
Concept introduction: A carbohydrate that contains hemiacetal is classified as reducing sugar whereas a carbohydrate which contains acetal is classified as nonreducing sugar. The reducing sugars are in equilibrium with an acyclic
Interpretation Introduction
(b)
Interpretation: The given compound is to be classified as reducing or nonreducing sugar.
Concept introduction: A carbohydrate that contains hemiacetal is classified as reducing sugar whereas a carbohydrate which contains acetal is classified as nonreducing sugar. The reducing sugars are in equilibrium with an acyclic aldehyde.
Interpretation Introduction
(c)
Interpretation: The given compound is to be classified as reducing or nonreducing sugar.
Concept introduction: A carbohydrate that contains hemiacetal is classified as reducing sugar whereas a carbohydrate which contains acetal is classified as nonreducing sugar. The reducing sugars are in equilibrium with an acyclic aldehyde.
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Students have asked these similar questions
How can distinguish among
the following pairs of
compound . by using .
....
a. starch and sucrose b.
celluloses and glucose c.
glycogen acid and fructose
Select one:
a. Tollen's reagent
b. Molish test
c. lebermann reagent
d. iodine test
SOURCE: GENERAL ORGANIC AND BIOLOGICAL CHEMISTRY BY SMITH 4TH EDITION
Report Table CHO.13: Results of Chemical Tests on Unknown Sample
Benedict's test: Blue solution
Choose...
A. reducing sugar not found
B. reducing sugar found
Fermentation test: Gas bubbles
Choose...
A. fermentation occured
B. fermentation did not occured
Seliwanoff's test: Red solution
Choose...
A. Aldose present
b. ketose present
c. neither
Iodine test: Colorless to brown solution
Choose...
a. amylose present
b. amylose not present
In your own words, describe the information you have gathered from each test about your unknown.
Which carbohydrate do you think your unknown is?
Explain your answer
A. glucose
b. fructose
c. sucrose
d. lactose
e. starch
d. cant not be determined
Chapter 28 Solutions
Organic Chemistry-Package(Custom)
Ch. 28 - Prob. 28.1PCh. 28 - Prob. 28.2PCh. 28 - Label each stereogenic center as R or S. a. b. c....Ch. 28 - Convert the ball-and-stick model to a Fischer...Ch. 28 - Prob. 28.5PCh. 28 - Prob. 28.6PCh. 28 - Prob. 28.7PCh. 28 - Prob. 28.8PCh. 28 - Prob. 28.9PCh. 28 - Prob. 28.10P
Ch. 28 - Prob. 28.11PCh. 28 - Prob. 28.12PCh. 28 - Prob. 28.13PCh. 28 - Prob. 28.14PCh. 28 - Prob. 28.15PCh. 28 - Prob. 28.16PCh. 28 - Draw a stepwise mechanism for the following...Ch. 28 - Prob. 28.18PCh. 28 - Prob. 28.19PCh. 28 - Prob. 28.20PCh. 28 - Prob. 28.21PCh. 28 - Draw the products formed when D-arabinose is...Ch. 28 - Prob. 28.23PCh. 28 - Prob. 28.24PCh. 28 - Prob. 28.25PCh. 28 - Prob. 28.26PCh. 28 - Prob. 28.27PCh. 28 - Prob. 28.28PCh. 28 - Prob. 28.29PCh. 28 - Prob. 28.30PCh. 28 - Prob. 28.31PCh. 28 - Prob. 28.32PCh. 28 - Prob. 28.33PCh. 28 - Prob. 28.34PCh. 28 - Problem-28.35
Draw the structures of the...Ch. 28 - Prob. 28.36PCh. 28 - 28.37 Convert each ball-and-stick model to a...Ch. 28 - Prob. 28.38PCh. 28 - Prob. 28.39PCh. 28 - Convert each compound to a Fischer projection and...Ch. 28 - Prob. 28.41PCh. 28 - Prob. 28.42PCh. 28 - Prob. 28.43PCh. 28 - Prob. 28.44PCh. 28 - Prob. 28.45PCh. 28 - Draw both pyranose anomers of each aldohexose...Ch. 28 - Prob. 28.47PCh. 28 - Prob. 28.48PCh. 28 - Prob. 28.49PCh. 28 - Prob. 28.50PCh. 28 - Prob. 28.51PCh. 28 - Prob. 28.52PCh. 28 - Prob. 28.53PCh. 28 - What products are formed when each compound is...Ch. 28 - Prob. 28.55PCh. 28 - Prob. 28.56PCh. 28 - Prob. 28.57PCh. 28 - Prob. 28.58PCh. 28 - 28.58 Draw a stepwise mechanism for the following...Ch. 28 - Prob. 28.60PCh. 28 - Prob. 28.61PCh. 28 - Prob. 28.62PCh. 28 - Prob. 28.63PCh. 28 - Prob. 28.64PCh. 28 - Prob. 28.65PCh. 28 - Prob. 28.66PCh. 28 - Prob. 28.67PCh. 28 - Prob. 28.68PCh. 28 - Prob. 28.69PCh. 28 - Prob. 28.70PCh. 28 - Prob. 28.71PCh. 28 - Prob. 28.72PCh. 28 - Prob. 28.73PCh. 28 - Prob. 28.74PCh. 28 - Prob. 28.75PCh. 28 - Prob. 28.76PCh. 28 - Prob. 28.77PCh. 28 - Draw a stepwise mechanism for the following...Ch. 28 - Prob. 28.79P
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- Fructose, present with glucose in honey, reacts with Benedicts reagent. Circle the structural features that enable fructose to react.arrow_forward1. Which sugars are reducing? Which sugars are non-reducing? a. Glucose: b. Fructose: c. Sucrose: d. Lactose: e. Sucrose hydrolysate: Starch hydrolysate: g. Cellulose hydrolysate: f. 2. What structural feature is responsible for the reducing property of carbohydrates?arrow_forwardWhich sugar will yield a single alditol upon reduction? A. Rhamnose B. Sorbose C. Xylulose D. Erythrulosearrow_forward
- Which compound will give a deep blue-black colored solution when treated with iodine? A. starch B. D-glucitol sucrose C. D-fructose D. D-galactose 1. Seliwanoff's tests is used to distinguish a monosaccharide from a disaccharide. A. a reducing sugar from a nonreducing sugar. B. a ketose from an aldose. C. a monosaccharide from a polysaccharide. D. a polysaccharide from a disaccharide.arrow_forwardIdentify the relationship between the two structures. a. Identical b. Enantiomers c. Diastereomers d. Constitutional isomers The molecule to the right has chiral carbon atoms and can have a total of stereoisomers. а. one; two b. two; four c. three; eight d. four; eight с.arrow_forwardQuestion 21 Match the structures with the description NH NH CHO CH HO CH, HO HỌ CH, NICH H. ocit, CH, он он HO но- HO HO он CH2 OH >arrow_forward
- VI. Compare and contrast D-glucose and L-glucose based on the following propertiesa. Melting pointb. Optical Activityc. Solubilityd. Reaction with an acide. Reaction with a –diolarrow_forwardConsider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence.a. Label all glycoside bonds.b. Classify each glycosidic linkage as α or β and use numbers to designate its location between two rings (e.g., 1→4-β).c. What products are formed when stachyose is hydrolyzed with H3O+?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH3I, Ag2O?f. What products are formed when the product in (e) is treated with H3O+?arrow_forward4. . Fill in the blanks for the following molecule. CI H CH₂OH H CICH₂ O H OH H H OH H HO H OH H H CH₂Cl a. This molecule is a b. This molecule connects two c. They are connected by a d. Circle the glycosidic bond. saccharide. saccharide units. glycosidic bond.arrow_forward
- D-Arabinose can exist in both pyranose and furanose forms.a. Draw the a and ß anomers of D-arabinofuranose.b. Draw the a and ß anomers of D-arabinopyranosearrow_forwardDraw the organic products formed in attached reactions?arrow_forwarda. Classify this monosaccharide (e.g., aldotriose)b. Does it have the D or L configuration? c. Which carbon and oxygen become bonded in the furanose ring form of this monosaccharide (e.g., C2O6, where O6 means the oxygen on carbon 6, or "not formed")? d. Which carbon and oxygen become bonded in the pyranose ring form of this monosaccharide e.g., C2O6 or "not formed"?arrow_forward
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