Pickles have a long shelf life and do not get spoiled for months, Why ?

Pickles have a long shelf life and do not get spoilt for months. Why?

Packet milk does not get spoiled for longer time, why?

Packet milk does not get spoiled for longer time, why?

Why food stuff gets spoiled?

Home made jams and gellies without any added chemical preservative additives spoil in a few days whereas commercial jams and jellies have a long shelf life. Explain. What role does added sodium benzoate play?

Home made jams and gellies without any added chemical preservative additives spoil in a few days whereas commercial jams and jellies have a long shelf life. Explain. What role does added sodium benzoate play?

Flavor savr tomatoes have a longer shelf life-give reasons.

Pickles do not get spoiled if they contain large amount of salt.