Homework Answers
The Benedict's test identifies reducing sugars (monosaccharide's and somedisaccharides), which have free ketone or aldehyde functional groups.
Barfoed's test is a chemical test used for detecting the presence of monosaccharides.
Seliwanoff's test is a chemical test which distinguishes between aldose and ketose sugars.
Iodine test is used only for distinguish starch from other carbohydrates.
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3. Determine whether mine whether each of the following compounds will give it or negative test...
3. Determine whether each of the following com for each of the following tests. Put a...
3. Determine whether each of the following com for each of the following tests. Put a + in the table result. The structures of the compounds are shown below. er each of the following compounds will give a positive or negative test result wing tests. Put a + in the table for a positive result and a-for a negative HOW CH, OH CH OH CHON CHOH OH OH HO ON CH.CH OH sophorose mannose rafinose Compound Benedict's Barfoed's Seliwanoll's lodine...
For each of the following compounds, indicate whether the compounds give a positiv ds give a...
For each of the following compounds, indicate whether the compounds give a positiv ds give a positive test with (a) Tollens's tagent and (b) Benedict's reagent? For both Tollens's and Benedict's reagents, briefly explain what is observed visually when the test is a positive test. Он OH HO b. ОН
2. Indicate whether the followin g carbohydrates will give a positive (+) or a negative (...
2. Indicate whether the followin g carbohydrates will give a positive (+) or a negative ( -) result with each test listed below Benedict's test Seliwanoff's test Fermentation test lodine test glucose fructose galactose sucrose lactose maltose amylose amylopectin
Which one of the following statements about compounds I and II is correct? Both will give...
Which one of the following statements about compounds I and II is correct? Both will give a positive Benedict's test Neither will give a positive Benedict's test Only compound I will give a positive Benedict's test Only compound II will give a positive Benedict's test.
Please, fill in first table for Seliwanoff's Test for Ketoses. Additional info is found in the...
Please, fill in first table for Seliwanoff's Test for Ketoses.
Additional info is found in the images following table. (Second
table is info and image following).
Part C: Seliwanoff's Test for Ketoses Seliwanoff's Test Results Test Tube Sample Prediction Ketose? (Y/N) Observations Distilled water Peach / no change Glucose Peach to red slowly Fructose deep red solution very quickly Sucrose deep red solution quickly Lactose Peach to red slowly Starch Peach to red very slowly Mystery sample Peach to red...
8. Discuss the results of the Benedict's test. Which compounds gave a positive result, and why?...
8. Discuss the results of the Benedict's test. Which compounds gave a positive result, and why? Which gave a negative result, and why? Use your data and the preliminary reading material to help answer this question Use your understanding of the Benedict's test and the iodoform test to answer the following 6. Two compounds have the molecular formula C3H.O.Draw their structural formulas and names using the following test results a Compound A forms a red orange precipitate with Benedict's reagent,...
Observations. Indicate whether each test was positive or negative and indicate what color each solution was...
Observations. Indicate whether each test was positive or negative and indicate what color each solution was after performing the tests. Describe what caused the observed results in the Benedict's Test for starch/saliva vs. starch buffer mixtures. Describe what caused the observed results in the iodine test for the starch/saliva vs. starch/buffer mixtures.
Q.5 Indicate the test results for each of the following compounds in the iodoform test and...
Q.5 Indicate the test results for each of the following compounds in the iodoform test and in the Benedict's test: Ladaform Test Benedict's Test CHOCH.CH o CH.CH CH,CH, CH, DHE CH,COLOM
a. For each pair of compounds, tell whether the structural formulas shown represent the same compound,...
a. For each pair of compounds, tell whether the structural formulas shown represent the same compound, different compounds that are constitutional isomers or different compounds that are not constitutional isomers. [4 x 1 mark] (1) and (11) and (111) and (iv) and b. Draw a structural formula for each compound. 1 (3E, 62) 2,9-dimethyl-3,6-decadiene (i) 1,6-Heptadiyne (111) 3-phenyl-1.3-butanediol [1 mark] [1 mark] [1 mark] c. Give TWO chemical tests which are indicated by a change in colour, (write the equation...
Practice Questions: Carbon Compounds 1. You test a sample with Biuret reagent, and observe a blue...
Practice Questions: Carbon Compounds 1. You test a sample with Biuret reagent, and observe a blue color at the end of the test. Which of the following statements is the best conclusion for this test result? A. You conclude that the sample has no starch. B. You conclude that the sample has no protein. C. You conclude that the sample has no lipid. D. You conclude that the sample has no reducing sugars. E. The test for starch was positive,...
3. Determine whether each of the following com for each of the following tests. Put a + in the table result. The structures of the compounds are shown below. er each of the following compounds will give a positive or negative test result wing tests. Put a + in the table for a positive result and a-for a negative HOW CH, OH CH OH CHON CHOH OH OH HO ON CH.CH OH sophorose mannose rafinose Compound Benedict's Barfoed's Seliwanoll's lodine...
For each of the following compounds, indicate whether the compounds give a positiv ds give a positive test with (a) Tollens's tagent and (b) Benedict's reagent? For both Tollens's and Benedict's reagents, briefly explain what is observed visually when the test is a positive test. Он OH HO b. ОН
2. Indicate whether the followin g carbohydrates will give a positive (+) or a negative ( -) result with each test listed below Benedict's test Seliwanoff's test Fermentation test lodine test glucose fructose galactose sucrose lactose maltose amylose amylopectin
Which one of the following statements about compounds I and II is correct? Both will give a positive Benedict's test Neither will give a positive Benedict's test Only compound I will give a positive Benedict's test Only compound II will give a positive Benedict's test.
Please, fill in first table for Seliwanoff's Test for Ketoses.
Additional info is found in the images following table. (Second
table is info and image following).
Part C: Seliwanoff's Test for Ketoses Seliwanoff's Test Results Test Tube Sample Prediction Ketose? (Y/N) Observations Distilled water Peach / no change Glucose Peach to red slowly Fructose deep red solution very quickly Sucrose deep red solution quickly Lactose Peach to red slowly Starch Peach to red very slowly Mystery sample Peach to red...
8. Discuss the results of the Benedict's test. Which compounds gave a positive result, and why? Which gave a negative result, and why? Use your data and the preliminary reading material to help answer this question Use your understanding of the Benedict's test and the iodoform test to answer the following 6. Two compounds have the molecular formula C3H.O.Draw their structural formulas and names using the following test results a Compound A forms a red orange precipitate with Benedict's reagent,...
Observations. Indicate whether each test was positive or negative and indicate what color each solution was after performing the tests. Describe what caused the observed results in the Benedict's Test for starch/saliva vs. starch buffer mixtures. Describe what caused the observed results in the iodine test for the starch/saliva vs. starch/buffer mixtures.
Q.5 Indicate the test results for each of the following compounds in the iodoform test and in the Benedict's test: Ladaform Test Benedict's Test CHOCH.CH o CH.CH CH,CH, CH, DHE CH,COLOM
a. For each pair of compounds, tell whether the structural formulas shown represent the same compound, different compounds that are constitutional isomers or different compounds that are not constitutional isomers. [4 x 1 mark] (1) and (11) and (111) and (iv) and b. Draw a structural formula for each compound. 1 (3E, 62) 2,9-dimethyl-3,6-decadiene (i) 1,6-Heptadiyne (111) 3-phenyl-1.3-butanediol [1 mark] [1 mark] [1 mark] c. Give TWO chemical tests which are indicated by a change in colour, (write the equation...
Practice Questions: Carbon Compounds 1. You test a sample with Biuret reagent, and observe a blue color at the end of the test. Which of the following statements is the best conclusion for this test result? A. You conclude that the sample has no starch. B. You conclude that the sample has no protein. C. You conclude that the sample has no lipid. D. You conclude that the sample has no reducing sugars. E. The test for starch was positive,...
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