oexplain the procedure andprecations to prove thepresence of strach in

1.	oexplain the procedure andprecations to prove thepresence of strach inleaves a experiment.
Answer» Procedure: Remove a green leaf from a plant that has been exposed to sunlight for a few hours Half-fill a 250cm3 beaker with water. Heat the water until it boils. Keep the water at boiling point. Use the forceps to place the leaf in the boiling water. Boil for 2 minutes. Turn off the Bunsen Burner. (If you are using a heat source without a naked flame - electric water bath or hot plate - this step is unnecessary.) Place the boiled leaf in a boiling tube containing 90% ethanol. Place the boiling tube in hot water and boil for 10 minutes or until the leaf decolourizes. ( It may be necessary to replace the ethanol) Gently remove the leaf and wash with a fine trickle of cold tap water. Spread the leaf evenly on a white tile. Add a few drops of iodine/potassium iodide solution to the leaf and note any observations

oexplain the procedure andprecations to prove thepresence of strach inleaves a experiment.

Answer»

Procedure:

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

Half-fill a 250cm3 beaker with water. Heat the water until it boils. Keep the water at boiling point.

Use the forceps to place the leaf in the boiling water. Boil for 2 minutes.

Turn off the Bunsen Burner. (If you are using a heat source without a naked flame - electric water bath or hot plate - this step is unnecessary.)

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

Place the boiling tube in hot water and boil for 10 minutes or until the leaf decolourizes. ( It may be necessary to replace the ethanol)

Gently remove the leaf and wash with a fine trickle of cold tap water.

Spread the leaf evenly on a white tile.

Add a few drops of iodine/potassium iodide solution to the leaf and note any observations