Table of Contents
Activity 6.2 NCERT class 10 science chapter 6 Life processes
Brief procedure:
Activity 6.2 asks us to test for starch in a plant with iodine, and compare it with the plant kept with potassium hydroxide.
Observation:
- Leaf of plant kept without potassium hydroxide turn blue with iodine solution.
- The plant with potassium hydroxide does not turn blue.
Explanation:
Potassium hydroxide is a highly reactive compound. It reacts with the carbon dioxide of the bell and forms its carbonate.
KOH + CO2 —————>K2CO3 + H2O
As a result, no carbon dioxide is available for the plant. In the absence of Carbon dioxide plant is unable to do photosynthesize and form starch. So, iodine does not turn the leaf blue.
The plant kept in bell without Potassium hydroxide can do photosynthesis and form starch. So, iodine solution here turns the leaf blue.
Inference/conclusion:
This experiment shows that carbon dioxide is necessary for photosynthesis and starch formation.
Next: Activity 6.3 – Enzymatic action of saliva on starch.
See also: Activity 6.1: Experiment to demonstrate that green part of the leaf is necessary for photosynthesis.
Ref: Biology Discussion.
It’s Damn good I got the reason for everything in that is used in the activity
Very helpfull thank you so much
Not helpfull
Wasteage of time
It’s quite helpful
Thnx for this
Thank you. It is very helpful and correct
Great. So helful
Thanks for this beautiful explanation
Thanks Wonderful Amazing Helpful Fantastic Liked
It is very helpful
it s really good for exams
Actually good
It’s very easy to understand and study.
This explanation was outstanding! I understood this so quickly and better.