Multiple choice

Four students are asked to test the presence of proteins in a given sample of egg yolk. Student 'A' added iodine solution into the food sample. Student 'B' added 15 drops of caustic soda into the food sample. Student 'C' added 2 drops of copper sulphate and 10 drops of caustic soda into the sample. Student 'D' added '5' drops of iodine solution and '15' drops of copper sulphate into the sample. Which among the four students has setup the experiment correctly?

  1. Student 'A'

  2. Student 'B'

  3. Student 'C'

  4. Student 'D'
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To test the presence of proteins in the given food material, 10 drops of water are added into the test tube containing the sample, 2 drops of copper sulphate solution and 10 drops of caustic soda solution are added. A violet colour indicates the presence of proteins in the food items.

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