Experimental procedures.
Chemical
1. Potassium permanganate.
2. Ground roasted rice.
3. Finely ground charcoal.
4. Powdered chalk ground.
5. White ash.
Materials - Equipment.
1. Bananas.
2. Plastic bags.
3. Papers.
4. Rubber band.
5. White cloth.
6. Weighing machine
7. Thermometer
8. Label paper
9. keeping box of bananas