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QUESTION 14 Which of the following compounds will give a positive test with Benedict's reagent? Briefly...
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,...
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
benedicts test and iodoform test: propanal propanone 3. Benedict's Test Indicate which of the two compounds will give a positive result and why. 4. Iodoform Test Indicate which of the two compounds will give a positive result.
Which or these would not give a red solution with Benedicts reagent? Reducing Disaccharides Which of these would not give a red solution CH2OH with Benedict's reagent? ÇH,OH (ОН CH,он HOV a-1,4-glycoside CH2OHN но то он ногоон А) он и Ион В-1,4-glycoside ОН Он он он В) CH2OH но —о а-1, В-1-glycoside CH2OH ул но —о. Ион он он/ a-1,6-glycoside но носн, он о HVOH YD) он ОН ОН он
Questions: 1. What is responsible for a positive Benedict's test? 12-KI test? 2. What is responsible for a positive Biuret test? How are lipids detected? 3. Which biomolecules are present in the food samples? Procedure: Benedict's test 1. Fill 100 mL Beaker with 40 mL of water. 2. Place the burner stand over the burner and light it up using a match. 3. Place the beaker containing water over the burner stand to make a water bath. 4. Label 3...
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.
QUESTION 20 Compound "A" exhibits the following chemical properties: It gives a negative Benedict's reagent test It forms a yellow precipitate, CHI3, when treated with 12 / OH-(with heating). When compound "A" is treated with LDA/THF (-78°C), a salt is formed that reacts with benzyl bromide to form compound "B" shown below! What is the structure of compound "A"? compound B benzyl bromide 5 OY = oooo = =
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use open chain Fisher projection). 2. Do you expect fructose to give a positive reaction with Barfoed's reagent? Explain why or why not. Indicate which of the test carbohydrates (glucose, fructose, lactose, sucrose, starch) would give 5- hydroxymethylfurfural when heated with hydrochloric acid. (See description of reactions for Barfoed's reagent and Seliwanoffs reagent). 3. 121
Among the alcohols listed for question 1, which ones would give a positive Bordwell-Wellman test? Among the compounds listed for question 1, which one is expected to react the fastest with Lucas reagent to produce a cloudiness in the test tube and why?
Aldehydes and Ketones C. Solubility, lodoform Test, and Benedict's Test 1. Soluble? 2. Iodoform 3. Methyl 4. Color Test Ketone? Propanol S.Oxidation (yesno) Benzaldehyde Acetone Cyclohexanone Unknown 6. Identify the unknown as propanal, benzaldehyde, acetone, or cyclohexanone. Give your reasoning. Questions and Problems 01 Indicate the test results for each of the following compounds in the iodoform test and in the Benedict's test: Idoform Test Benedict's Test CHỊ C-CH, CHỊ CH, - - CH-CH2-C-CH2-CH CHỊ C-CH-CH