Concept:A non-reducing sugar must first be hydrolysed into a reducing sugar before it can give a positive Benedict's test.
Explanation:The non-reducing sugar does not react directly with Benedict's solution.
Boiling it with dilute hydrochloric acid in step II breaks it down into reducing sugars.
Sodium hydroxide solution is added in step III to neutralise the acidic mixture.
After neutralisation, Benedict's solution is added in step IV.
The reducing sugar present reacts with the blue
Cu2+ ions.
This reaction forms an insoluble precipitate of
Cu2O.
The precipitate has a brick-red colour, which indicates a positive result for a non-reducing sugar.
Answer:brick-red.