Question

write an activity to find out the presence of starch in food.

Answer 1

The presence of starch in food :

Material required :

Test tubes, test-tube stand and holder, burner, dropper, iodine solution, distilled water, and food.

Working model :

• Take a test tube and add the tiny amount to food particles to it.

• Then, add 8 to 12ml of distilled water to the solute and heat the test tube.

• Filter out the solid particles and add few drops of iodine solution to the filtered water solution.

• If the solution turns blue-black colour, it represents the presence of starch in the food.

Here we present to one more model to test the starch presence in raw substances.

starch + glucose produces electricity.

WORKING MODEL TO TEST THE PRESENCE OF STARCH USING POTATO.

Material required :

Potato, Wires, Two iron nail, A bulb (or a battery and a switch).

Working model :

• Take a potato and priick the iron nails on the both ends of it, a bit deep. ( To the extremes, if possible ).
• The more the distance between the nails, the more ions (of starch) attract them (terminals), resulting more voltage.
• The salt in the potato acts as a salt bridge between the nails, makes the ions travel through the nails.
• Connect one wire's one end to one nail and other end to the positive electrode of a bulb (or battery).
• Connect second wire's one end to one nail and other end to the negative electrode of a bulb (or battery). If you opted the battery, switch it on, now.
• The bulb starts to glow.

Quick fact :

Researchers say that an 8 minute boiled potato produces 10 times more electric current than the raw one does.

Learn more :

Information about starch

       brainly.in/question/2340036

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