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Carbohydrate Testing: Molisch and Benedict's Tests

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Carbohydrate Testing: Molisch and Benedict's Tests

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Questions and Answers

What is the purpose of Selivanoff's test?

To identify non-reducing sugars

To differentiate between ketoses and aldoses (correct)

To detect the presence of starch

To estimate reducing sugars

Which test is used for the detection of galactose and lactose?

Osazone test

Tollen's test

Mucid acid test (correct)

Fehling's test

How does the iodine test indicate a positive result?

Appearance of yellow-colored crystals

Formation of a dark grey precipitate

Blue-black or purple color (correct)

Cherry red-colored complex

What does the formation of a silver mirror indicate in Tollen's test?

Presence of reducing sugars/aldoses Signup and view all the answers

Which reagent is used in Osazone test?

Phenylhydrazine in acetate buffer Signup and view all the answers

What is the key function of Fehling's test?

Estimation or detection of reducing sugars Signup and view all the answers

Which test is specifically used to detect the presence of pentoses?

Bial's Test Signup and view all the answers

What color indicates the presence of carbohydrates in the Molisch Test?

Purple Signup and view all the answers

Which reagent is crucial for the Barfoed's Test to detect reducing monosaccharides?

Barfoed's reagent Signup and view all the answers

What is the purpose of Benedict's Test?

Detects reducing sugars Signup and view all the answers

In the Bial's Test, pentoses are dehydrated into which compound that forms a blue-green precipitate?

Furfural Signup and view all the answers

What indicates a positive result in the Molisch Test for carbohydrates?

Purple or purplish-red ring Signup and view all the answers