Activity 6.1 | Life processes Class 10 Science | Experiment Chlorophyll required for photosynthesis

Activity 6.1
1) Take a potted plant with variegated leaves – for example, money plant
or crotons.
2) Keep the plant in a dark room for three days so that all the starch
gets used up.
3) Now keep the plant in sunlight for about six hours.
4) Pluck a leaf from the plant. Mark the green areas in it and trace them
on a sheet of paper.
5) Dip the leaf in boiling water for a few minutes.
6) After this, immerse it in a beaker containing alcohol.
7) Carefully place the above beaker in a water-bath and heat till the
alcohol begins to boil.
8) What happens to the colour of the leaf? What is the colour of the
solution?
9) Now dip the leaf in a dilute solution of iodine for a few minutes.
10) Take out the leaf and rinse off the iodine solution.
11) Observe the colour of the leaf and compare this with the tracing of
the leaf done in the beginning (Fig. 6.2).
12) What can you conclude about the presence of starch in various leaves.

[pranitasawant]

This is so underrated channel more attention to such a beautiful content

[kaniskathisaanth]

Omg! The tracing is beautiful 😮. And why do we need to break the cell wall?

[eclipwzetish]

Why we used ethanol?
What's the function of it??

[DivyaKadian]

Thanku mam to make this useful videos for us.

[ThaseenaThaseena-bmfo]

Thanks a lot mam thie is very important for 🎉🎉❤ once again thanks🌹 mam

[kanishk.s]

Could Understand Everything Clearly now....

[manionduty]

thank you i wanted to learn this as this can be asked in boards

[robinadi]

Why does the leaf need to be variegated ?

[sarahkhan]

THANK YOU SO MUCH! This is so detailed. Thank you!

[deepahirwar]

Why there is need to remove chlorophyll?

[MAZEENJAWAD]

Hello mam I student from Telangana, the same activity