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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Qualitative Analysis of Carbohydrates

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1. What will be the reaction product of Xylose undergoing Bial’s test ?

a: Blue colour condensation product Explanation

Explanation

b: Bluish green colour condensation product Explanation

Explanation

c: A muddy brown colour precipitate Explanation

Explanation

d: Cherry red colouration Explanation

Explanation

2. What is the role of sulphuric acid in Molisch’s test ?

a: Reducing agent Explanation

Explanation

b: Oxidant Explanation

Explanation

c: Colour production Explanation

Explanation

d: Dehydrating agent Explanation

Explanation

3. If a sample being tested gives a positive result for Benedict’s test and Fehling's test, then what will the sample be ?

a: Reducing sugar Explanation

Explanation

b: Non-reducing sugar Explanation

Explanation

c: Monosaccharide Explanation

Explanation

d: Disaccharide Explanation

Explanation

4. Which test distinguishes between pentoses and hexoses ?

a: Barfoed’s test Explanation

Explanation

b: Sackaguchi test Explanation

Explanation

c: Seliwanoff’s test Explanation

Explanation

d: Bial’s test Explanation

Explanation

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