8 Questions
What is the basic principle involved in the Molisch's test for carbohydrates?
Formation of aldehyde by dehydration
Which reagent is used in the Iodine test for detecting carbohydrates?
Iodine and potassium iodide
What color change indicates a positive result in the Molisch's test for carbohydrates?
Purple or violet
Why is potassium iodide used in making the IKI solution for the Iodine test?
To dissociate into iodide ions
In the Iodine test, what type of ions combine to form polyiodide ions?
Iodide ions
What do polyiodide ions in the Iodine test form a complex with?
Amylose
Why does molecular iodine need potassium iodide to form the IKI solution?
To make it soluble in water
What happens when an aldehyde formed in Molisch's test condenses with two phenol-type molecules?
Formation of a purple or violet ring
Learn about the principle behind Molisch's test, where carbohydrates undergo dehydration in the presence of concentrated sulphuric acid to form a purple or violet colored ring. Understand the procedure and interpretation of results.
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