It has been experimentally proved that the juice of an unripe fruit (apple, pear) gives a reaction with iodine

It has been experimentally proved that the juice of an unripe fruit (apple, pear) gives a reaction with iodine, and that of a ripe fruit does not give such a reaction. Explain why this is happening.

This is because there is starch in unripe fruits, which is then converted into glucose or sucrose, which do not react with iodine.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.