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Which change indicates that a fermented pickle has begun to spoil after fermentation?

  • A.The fruit becomes firmer than it was before
  • B.The pH rises and the lactic acid disappears
  • C.The pH falls further as more acid is produced
  • D.The salt concentration slowly rises on its own

Answer: B

Acid loss with a rising pH is the signature of secondary spoilage, usually because film yeasts or moulds have consumed the lactic acid at the surface. Once the pH climbs, organisms that the acid had been excluding are able to grow.

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