Question

variegated leaves (leaves with some green portions and some
non-green portions) are treated with iodine solution?

Answer 1

The color of the green portion (A) before the starch test will be pale yellow because chlorophyll needs to be removed before the starch test. The color of the green portion (A) after the start test will be blue-black because of the reaction of iodine with the starch present in A.
The Equation of photosynthesis is :
6CO
2
​
+ 6H
2
​
O + Light energy = C
6
​
H
12
​
O
6
​
+ 6O
2
​
.
Oxygen is obtained from the water. H
2
​
O -> 2H
+
+ 1/2O
2
​
.