moomoo1703 moomoo1703
  • 17-04-2024
  • Chemistry
contestada

Negative Control Tube 4 had starch in it just like tubes 1 and 2 but did not show a reaction with the Benedict's reagent. Why not?
A. tube 4 didn't have Benedicts reagent in it
B. tube 4 was contaminated
C. tube 4 didn't have pH 2 in it
D. tube 4 didn't have amylase in it

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