Question

State whether following statements are true or false​:

Statement 1: The iodine test helps us to detect the presence of starch in the leaf.​​​
Statement 2: In the iodine test, the change in the blue-black ​colour ​of the leaf indicates the absence of starch.​​​

• A. Statement 1: False; Statement 2:True​
• B. Statement 1: True; Statement 2: True​
• C. Statement 1: False; Statement 2: False​
• D. Statement 1: True; Statement 2: False​

Answer 1

The correct option is D Statement 1: True; Statement 2: False​

• During the process of photosynthesis, sugar is produced which is stored as starch in leaves.

• So Iodine test is used to confirm starch in the leaves.

• Hence, statement 1 is true

• In the Iodine test, when starch comes in contact with iodine, then it turns into blue-black colour.

• It shows the presence of starch in the leaves.

• Hence, statement 2 is false.