12 Questions
What is the purpose of Molisch's test?
To check for the presence of carbohydrates in a given analyte
What is the name of the reagent used in Molisch's test?
Molisch's reagent
Which carbohydrates do NOT give a positive result in Molisch's test?
Tetroses & trioses
What color change confirms a positive reaction in Molisch's test?
Purple or purplish-red
In Molisch's test, what catalyzes the dehydration of sugars to form furfural or hydroxymethyl furfural?
$\text{H}_2\text{SO}_4$
What is the basis for the positive response in Molisch's test for carbohydrates?
Dehydration of sugars to form furfural derivatives with the presence of certain reagents
What property of monosaccharides and oligosaccharides makes them readily soluble in water?
Presence of polar hydroxyl groups
Why are there several difficulties in the qualitative analysis of carbohydrates in a sample that contains a mixture of carbohydrates?
Structural and chemical resemblance between carbohydrates
What recommendation is given for carrying out qualitative tests for carbohydrates in a laboratory setting?
Conduct the tests with individual sugars rather than mixtures
Why are specific rapid tests recommended for establishing the presence or absence of sugars or carbohydrates in a sample?
To simplify and expedite the identification process
What is the most common type of test used to detect the presence of carbohydrates in a solution?
Group test for carbohydrates
What concentration range of sugar solutions is typically used to confirm the sensitivity of carbohydrate tests?
0.1-1 percent
Explore the solubility of carbohydrates and learn about the qualitative tests used for analyzing sugars. Understand the challenges in qualitative and quantitative analysis of carbohydrate mixtures.
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