Can galactric acid test/mucic acid test be used to determine the presence of milk in milk-chocolate bar? How? What is the reaction involved in this test?
Q: Discuss the principle behind Salkowski test, reaction with ammonium ferrothiocyanate, and…
A: Introduction: Lipids are defined as esters of alcohol and fatty acids which are water-insoluble and…
Q: Using Benedict's Test would the substance (saliva + acid + potato chips) test positive or negative?…
A: Benedict's test is used for the identification of reducing sugars such as simple carbohydrates…
Q: What is the result for the yellow tube of Methyl red test? What must the pH be in each tube? What is…
A: Methyl red test This test usually aims to differentiate the facultative anaerobes enteric bacteria.…
Q: The table below summarizes the results for Millon's test. Provide the correct remarks from the…
A: Millon’s test is an analytical test used for the detection of the hydroxy phenol groups. Since the…
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A: Thin layer chromatography, or TLC, is an analytical method to analyse mixtures by separating the…
Q: Kovac's reagent is added to detect indole. True or False?
A: True
Q: solution is tested with three indicators and it has a pH of 9.8. Identify the colours of the…
A: pH 9.8 corresponds to basic pH range. Asked : To identify the colours of the given indicators at pH…
Q: Which of the following statements best describe testing of lactose sample?* A. Lactose will…
A: Lactose is a reducing disaccharide . It is formed as β-D-galactose forms a 1,4 glycosidic bond with…
Q: Provide a chemical test/reagent that would differentiate each of the following pairs of compounds.…
A: Asked : Reagent and indication of positive test
Q: Why should the use of nichrome or iron containing loop/wire be avoided as an inoculating device when…
A: The oxidase is a test used in microbiology to identify bacteria that produce cytochrome c oxidase.…
Q: Explain the chemical basis (reaction) of Millon’s test. (Generic reaction and explanation) What is…
A: Proteins are made up of amino acids joined together by peptide bond. Proteins can be estimated by…
Q: Why does glucose not give positive results with an iodine test but not starch?
A: The iodine-starch test is a chemical reaction that is used to presence of starch which gives intense…
Q: In urea hydrolysis what emd product is specifically being tested for in this test? Is the final ph…
A: The general formula or urea is NH2CONH2. Urea breakdown requires the enzyme urease. It is primarily…
Q: Millon-Nasse Test Mix 1 mL of the sample and 5 drops of Millon-Nasse reagent. Boil the content…
A: MILLON'S TEST: It is an analytical test specific for tyrosine. It is not specific for…
Q: what are the principle chemical reaction involved in each test?
A: The primary, secondary and tertiary alcohols react with hydrogen halides in a different manner and…
Q: Give and explain the principles of the following tests for lipids: Spot Test Acrolein Test Test for…
A: Your question has multiple subparts. I will answer 1st three of the subparts, as per the guidelines.…
Q: Bial's test uses concentrated HCI as a dehydrating acid and orcinol + traces of ferric chloride as…
A: We'll answer the first question since the exact one wasn't specified. please submit a new question…
Q: Which is the better reagent for the clinical test between Fehling's solution and Benedict's…
A: The reducing sugars get oxidized by reducing some other component. This reducing property of these…
Q: Draw/illustrate the chemical reaction involved in Lugol’s test and explain the purpose of this…
A: Carbohydrates are polymer molecules that are composed of monosaccharide molecules. Monosaccharides…
Q: What nutrients do the following media components contain? Peptone Yeast extract Beef…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…
Q: An amount of phenylhydrazine was added into test tube containing acetaldehyde for osazone test.…
A: Phenylhydrazine test is used to detect the presence of different reducing sugars. Different shapes…
Q: A plant isolate was subjected to qualitative tests to determine the presence of macromolecules.…
A: Plant isolates are obtained from different tissue homogenate samples of plant parts. Usually, a…
Q: Polysaccharides generally do not give a positive test with Fehling’s solution. Why? *
A: Postive test with Fehling's solution- Given by reducing sugar Polysaccharides- Long chain of…
Q: What is the reagent used to detect glucose in the ph and temperature experiments? What is its…
A: Presence of Glucose is detected using Benedict's Test, Fehling's Test, and Barfoed's Test. Presence…
Q: does ribose-5-phosphate pass fehlings test?
A: Fehling's test is one of the sensitive test for detection of reducing sugars. Fehling's solution is…
Q: What is the purpose of the sodium thiosulphate in the testing of treated water?
A: Testing of wastewater and treated water both demand a standardized process to be followed to obtain…
Q: A solution of flycine and a solution of albumin were prepared with the same concentration (g/L). One…
A: The ninhydrin test is a chemical that is used to determine the presence of alpha amino groups in the…
Q: what is the practical application of milk test of aldehydes?
A: Milk powder is an important product for both direct consumption and as a food ingredient. The milk…
Q: What is an absorption spectrum? The following graph is the visible absorbance spectrum of an…
A: There are different types of electromagnetic radiation. The different radiations have different…
Q: Why sucrose gives negative Benedict test?
A: Benedict's reagent is a chemical reagent which is a mixture of sodium carbonate, sodium citrate, and…
Q: After how minutes the color is obtained with each carbohydrate in Resorcinol test?
A: this a test for carbohydrates.
Q: What test reagent is most sensitive in detecting sugar in urine? What are the possible positive…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
Q: need to dissolve cholesterol in Chloroform in the Liebermann-Burchard Test
A: The reaction of acetic anhydride in chloroform with unsaturated steroids (e.g. cholesterol) in the…
Q: Instead of Molisch's test, what specific test can be used to detect the presence of pentose sugar?
A: A monosaccharide that has five carbon atoms is referred to as pentose sugar. Ribose present in RNA…
Q: What are the colour changes occur to the reducing sugars after benedict test is performed? Please…
A: Reducing sugar is a sugar that is capable to act as a reducing agent. Reducing sugars are the ones…
Q: What is true about 'cracking' of emulsion? Select one: O a. The primary emulsion does not become…
A: Emulsion can be defined as the mixing of two or more liquids which are not immiscible (nonmixable or…
Q: Explain main difference would you see when conducting the nitrous acid test with aniline vs.…
A: Nitrous acid test with aniline will give stable diazonium salt as aniline is primary aromatic amine.
Q: Match the following: Schiff test Tollen’s test Fehling’s test Benedict's test Iodoform test 2,4-DNP…
A: 1. Schiff test-Bounded aldehydes When schiffs base is added to aldehyde, it combines with H2SO3 ans…
Q: Will disaccharides and polysaccharides give a positive result for Molisch test?
A: Disaccharides: Di means two which means it is a double sugar. It is a sweet white crystalline solid…
Q: What is the detection principle of iodine test for starch
A: The iodine test is a quantitative analysis of carbohydrates to distinguish polysaccharides from…
Q: Laemmli buffer, also referred to as SDS-reducing buffer, is added to each of the samples. It is a…
A: Buffer is defined as any solution that resists small change in its pH. Laemmli buffer is formulated…
Q: Why does Alka-Seltzer foam and bubble when dissolved in water? Which ingredient is the antacid?
A: Alka- Seltzar is a type of medicine which is used to cure indigestion, stomach pain or upset…
Q: Are Xanthoproteic and MillonNasse tests satisfactory for use in the urinary examination for protein?…
A: The pH of urine varies from 5.5 to 7.5. If the diet is rich in proteins, sulfuric and phosphoric…
Q: An unknown solution contains a single pure sugar. It gives positive results to Molisch’s and…
A: The qualitative tests are used to identify the presence of certain sugar in the given sample.…
Q: WHAT IS THE IMPORTANCE/BENEFITS OF BENEDICT'S TEST IN TEST FOR REDUCING SUGAR?
A: BENEDICT'S TEST is a test used to identify the sugars (usually monosaccharides and some…
Q: what color will cellulose turn for iodine test?
A: Cellulose is an important component of cell wall of plants. It is a Polysaccharide made up of beta D…
Q: The original concentration in a sample of kombucha is 2.79 x 10^6 CFU/ml. Which dilution would yield…
A: Formula, Original cell count = #colonies / (volume plated × dilution) Viable plate count = 30 - 300
Q: The table below summarizes the results for Hopkins-Cole test. Provide the correct remarks from the…
A: The amino acid tryptophan has a side chain containing an indole ring.
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- Which is the commonly occurring sugar in milk? Will the milk containing this sugar gives a positive result for the test " Detection of sugar in Milk"?What does translucent spot mean with regards to lipid? Identify the control for this test. 1. Oil 2. Cheese 3. Water 4. CheeseWhat does translucent spot mean with regards to lipid? Identify the control for this test. 1. Cheese
- Can the resazurin reduction test be used to determine whether a milk is properly pasteurized or under pasteurized? Explain.Xanthoproteic test is used to detect amino acids containing an aromatic nucleus in a protein solution which gives yellow color, but why does phenylalanine gives negative result?An unknown solution contains a single pure sugar. It gives positive results to Molisch’s and Benedict’s tests but is negative for all others. What is the sugar? Is it sucrose, lactose, or xylose? Explain your choice.
- By alkaloidal reagent Place 3mL of egg albumin solution in each of the two test tubes, to one tube add 1 – 2 ml of tannic acid solution and to other one picric acid. Describe the appearance of the protein solutions in each of the tubes after addition of the alkaloidal reagents.What are the colour changes occur to the reducing sugars after benedict test is performed? Please mention the colour change observed for each reducing sugars in benedict testGive the chemical principles involved in a positive Biuret test, Millon’s Test and Sakaguchi Test. What is the chemical basis of the Ninhydrin Test, Hopkins – Cole test and Sulfur reaction test? What chemical structure should be present in an amino acid or protein to give a positive Xanthoproteic test?
- The table below summarizes the results for Millon's test. Provide the correct remarks from the results if Negative for Millon's Test or Positive for Millon's Test and if Contains phenolic hydroxy group or Does not contains phenolic hydroxy group.Why sucrose gives negative Benedict test?The original concentration in a sample of kombucha is 2.79 x 10^6 CFU/ml. Which dilution would yield a countable plate? How would you make this? Show your calculations. Confused as to what's implied by "which dilution"? does it mean, how many times?