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?

Options

A. What care is taken to prevent damage to the leaf?
B. What care is taken while pouring spirit into the test tube?
C. What happens to the colour of the leaf when solution is poured on it?
D. Can this test be done without removing chlorophyll?

Answer

C