Question

Justify the presence of carbohydrate in the given chemical solution
with the help of suitable bio-chemical test
Glucose solution​

Answer 1

Explanation:

Justify the presence of carbohydrate in the given chemical solution

with the help of suitable bio-chemical test

Glucose solution

Answer 2

The justification of the presence of carbohydrates in the given chemical solution is given below:

• The presence of carbohydrates in a glucose solution can be detected using the Fehling Test.
• This test is only given by reducing sugars (like glucose).
• The formation of a red-colored precipitate of Cu₂O on the addition of the Fehling's solution confirms the presence of carbohydrates.
• The copper ions present in Fehling’s solution in the +3 state are reduced to the +2 state while glucose is oxidized to gluconic acid.
• The reaction is as follows:

       C₆H₁₂O₆ + 2 Cu (OH)₂ + NaOH → C₆H₁₁O₇Na + 3H₂O + Cu₂O