A teacher of Class VII demonstrates the following activity in the class"A leaf is put in a test tube and spirit is poured over it. Then the test tube is put in a beaker half-filled with water and heated till the leaf is discoloured. The leaf is then taken out and a few drops of iodine are put on it. The leaf turns blue-black in colour." After this activity, the teacher gives some questions for the assessment of various indicators of learning.Which of the following would assess 'analysis'?
  • 1

    What care is taken while pouring spirit into the test tube?

  • 2

     What care is taken to prevent d<!mage to the leaf?

  • 3

     What happens to the colour of the leaf when solution is poured on it?

  • 4

    Can this test be done without removing chlorophyll?

Answer:- 4
Explanation:-

It is important to remove chlorophyll because it is a green pigment and so marks the colour change of the Iodine test for starch.

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