Question

Jam and pickles cannot be kept in refrigerator

Answer 1

hey palak here ☺️☺️

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Many bacteria don't grow well if the temperature is cold-ish (i.e. in the refrigerator), or if the conditions are very salty (pickle brine) or sugary (jam). 

That said, I would be utterly surprised if there weren't some bacteria somewhere in the world, who could grow under those conditions ... however, even if they get into your particular jars in your refrigerator, bacterial growth is probably going to be a lot harder to spot by eye than fungal growth, because they don't (generally) make the elaborate mycelial structures (the fuzzy stuff that you see). You can usually measure bacterial growth by the turbidity of the solution, which is going to be quite hard to see in something like pickle brine or jam. Your best bet for detecting bacterial growth is probably by smelling an "off" odor in these foods if they were to be contaminated. (They're probably just fine, however - as I mentioned above, most bacteria will not grow well under these conditions.)❤️❤️❤️