Question

prove that milk you drink contains protein

Answer 1

Aim :
To prove that milk contains protein.

Apparatus required:  

 test tubes, 2%CuSO4 [COPPER SULPHATE]solution and 10% NaOH [SODIUM HYDROXIDE]solution.

Procedure:
1. Prepare 2% of CuSO4 soluion by dissolving 2 grms of CuSO4 in 100ml of water.
2. Prepare 10% of NaOH solution by dissolving 10 grms of NaOH in 100ml of water.
3. Take a test tube and pour 2 drops of CuSO4 solution and 10drops of NaOH solution along with milk in it.

Observation:
we observe that the milk will turn to violet or purple in colour which confrims the presence of proteins in milk.

Conclusion:
By this activity we can prove that milk contains proteins.

Answer 2

Aim : 
To prove that milk we drink  contains protein.

Materials required:  

 Two test tubes, 2%COPPER SULPHATE solution and 10%  SODIUM HYDROXIDE solution.

Procedure:
1. Prepare 2% of COPPER SULPHATE soluion by dissolving 2 grms of COPPER SULPHATE in 100ml of water.
2. Prepare 10% of Sodium Hydroxide solution by dissolving 10 grms of Sodium Hydroxide in100ml of water.
3. Take a test tube pour 2 drops of copper sulphate solution and  10drops of NaOH solution.
4. take another test tube containing  milk in it.
5. Add 2 drops of copper sulphate solution and  10drops of NaOH solution in milk test tube

Observation:
we observe that the milk will turn to  purple in colour which confirms the presence of proteins in milk.

Result:
Thus, we can say Milk contains proteins