Question

Why do pieces of Apple and orange get spoiled after sometime while jam made out of these fruits do not

Answer 1

because fresh fruits contain more amount of water particles while jam is first boiled and then made to a thick semi solid substance. Though it is boiled the water content inside it vaporized .Since there is less amount of water there is less chance to get spoiled

Answer 2

Jam made out of fruits does not spoil as quickly as the fruits because the fruits have been processed and additives added to them including preservatives to increase their shelf life.

The preservative acts to inhibit any growth of bacterial micro organisms ,yeast or moulds and thus keeps the jam fresh for longer.