Question

whose presence can be detected by using water copper sulphate and caustic soda with food​

Answer 1

Answer:

proteins

Explanation:

Presence of proteins in the food can be identified by using water, copper sulphate and caustic soda

• Firstly, the solid food is crushed and an adequate amount of water is added to the food sample

• Then an equal amount of caustic soda (NaOH) and a few drops of 1% copper sulphate solution (CuSO₄) is added to sample

• The presence of protein in the food sample is indicated by Purple/Mauve colour

• This test for proteins is known as the Biuret test