A student carried out the Benedict’s test on a sample and got a negative result.
What should the student do to confirm there are no sugars present in the sample?
1 )
boil the sample for 5 minutes then repeat the Benedict’s test
2 )
boil with alkali, neutralise with hydrochloric acid and repeat the Benedict’s test
boil with hydrochloric acid, neutralise with alkali and repeat the Benedict’s test
4 )
repeat the Benedict’s test but add more Benedict’s reagent
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