Q. 2 B4.5( 17 Votes )

Answer the following:

Explain the method of testing a leaf for starch.

Answer :

Aim: To test the presence of starch in a leaf.


Material required:


Electric water bath or hot plate, 3 beakers of 250 ml, boiling tube, forceps, test tube holder, leaf to be tested ( leaf of China rose will be good), 90 % ethanol and iodine solution.


Procedure:


● Remove a green leaf from a plant that has been exposed to sunlight for a few hours.


● Fill three 250ml beakers half with water. Heat the water until it boils. Keep the water at boiling point. Put the leaf in the boiling water using forceps.


● Boil for 2 minutes.


● Put the boiled leaf in a boiling tube containing 90% ethanol.


● Put the boiling tube in hot water and boil for 10 minutes to decolorize leaf.


● Remove the leaf and wash cold water.


● Add a few drops of iodine solution to the leaf and observe.


After iodine solution was added...




Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Goprep Genius Quiz on Direct and Inverse proportions32 mins
Genius Quiz | How, When and Where38 mins
QUIZ | Exponents and PowerFREE Class
Champ Quiz | Force, Pressure & Sound29 mins
Quiz on Friction + Force30 mins
Cell - Number, Size and Shape40 mins
Fun and Games with Conjunctions46 mins
Interactive Quiz - Coal30 mins
Champ Quiz | Important Qs. on Petroleum30 mins
Champ Quiz | Cell44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses