Table 2.1: Benedict's test for reducing sugar. Tube
Solution
Benedict's Color Reaction
Positive or Negative
2
3
4
2 ml onion juice
2 ml potato juice
2 ml sucrose solution
2 ml reducing sugar solution
2 ml starch solution
2 ml glucose solution
2 ml distilled water
5
6
7
Questions
1. Which of these solutions is the positive control (i. e., the one you know will be positive, even
before you run the test)?
2. Which of these solutions is the negative control (i. e., the one you know will be negative, even
before you run the test)?